Energy storage cabinet cabin and temperature adjusting system

Abstract

The utility model provides an energy storage cabinet cabin and a temperature adjusting system. The temperature adjusting system of the energy storage cabinet cabin comprises a first heat exchanger, a second heat exchanger and a temperature adjusting device, the first heat exchanger is provided with a fan and used for exchanging heat with air in the energy storage cabinet cabin, and an inlet pipeline and an outlet pipeline of the first heat exchanger are provided with a first inlet valve and a first outlet valve respectively; the second heat exchanger exchanges heat with the battery pack in the energy storage cabinet cabin, and an inlet pipeline and an outlet pipeline of the second heat exchanger are provided with a second inlet valve and a second outlet valve respectively; and the refrigerating system provides heat exchange liquid for at least one of the first heat exchanger and the second heat exchanger which are connected in parallel, and recovers the heat exchange liquid after heat exchange. The temperature field in the energy storage cabinet cabin can be considered, and the temperature difference between the energy storage cabinet cabin and the battery pack is prevented from being too large.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration systems, in particular to a temperature regulation system for regulating the temperature of a storage cabinet compartment. Background Art

[0002] Many existing devices use energy storage batteries. The temperature control technology of energy storage batteries is one of the core parts of the energy storage system, which is directly related to the performance, safety and service life of the batteries. With the rapid development of energy storage technology, how to effectively control the temperature of the batteries in different environments has become the focus of attention of technicians. Because the temperature management of energy storage batteries is crucial. Too high or too low temperature will affect the chemical reaction rate, internal resistance, capacity decay rate and safety of the batteries. At high temperature, the battery may undergo thermal runaway, leading to serious accidents such as explosion or fire; at low temperature, the electrochemical reaction of the battery slows down, the internal resistance increases, resulting in a decrease in charge and discharge efficiency. In addition, uneven temperature will cause inconsistent voltages of different battery cells in the battery pack, accelerating the aging process of the batteries. Therefore, in the design of the energy storage system, effective temperature control must be carried out to ensure the safe and efficient operation of the batteries under various environmental conditions.

[0003] The temperature control methods in the energy storage system are mainly divided into active cooling and passive cooling. Active cooling usually relies on air cooling or liquid cooling systems to actively adjust the temperature of the battery pack through external devices; while passive cooling uses means such as the thermal conductivity of materials, heat sinks and phase change materials to dissipate heat through natural convection or radiation.

[0004] The air-cooled energy storage unit mainly relies on air convection to take away the heat generated by the energy storage battery during operation. The advantage of this system is that it has a simple structure, low cost and convenient maintenance, and is suitable for scenarios with moderate ambient temperature and little temperature change. The air-cooled system usually introduces external air into the unit through a fan, and transfers the heat of the battery pack to the air through a heat exchanger, and then discharges the heated air out of the system. However, the disadvantages are low heat transfer efficiency, high noise, and large influence by the ambient temperature.

[0005] The liquid-cooled energy storage unit takes away the heat of the battery pack through a cooling liquid. The liquid-cooled system usually includes a circulation pump, a coolant pipeline and a heat exchanger. The coolant is pushed by the circulation pump, flows through the battery pack, and transfers the heat to the external environment through the heat exchanger. It runs quietly, has strong environmental adaptability, and the applicable ambient temperature range can reach -30°C to 50°C. Therefore, most of the current energy storage batteries adopt the liquid-cooled method.

[0006] For some larger energy storage systems, energy storage batteries are usually placed in energy storage cabinet compartments. The temperature of the energy storage cabinet compartments is greatly affected by the external environmental temperature, and it also has a certain impact on the environmental temperature of the energy storage batteries. Currently, the existing technology usually only adjusts the temperature of the energy storage batteries, resulting in too large a temperature difference between the energy storage cabinet compartments and the energy storage batteries, which is likely to cause unnecessary energy consumption waste.

[0007] Therefore, how to reduce the temperature difference between the energy storage batteries and the energy storage cabinet compartments where the energy storage batteries are located is a technical problem to be solved. Utility Model Content

[0008] In order to solve the technical problem of the large temperature difference between the energy storage battery and the energy storage compartment in the prior art, the present utility model proposes an energy storage cabinet compartment and a temperature regulation system.

[0009] The temperature regulation system of the energy storage cabinet compartment proposed by the present utility model includes:

[0010] A first heat exchanger, which is provided with a fan and is used for heat exchange with the air in the energy storage cabinet compartment. A first inlet valve and a first outlet valve are respectively provided on its inlet pipeline and outlet pipeline;

[0011] A second heat exchanger, which exchanges heat with the battery pack in the energy storage cabinet compartment. A second inlet valve and a second outlet valve are respectively provided on its inlet pipeline and outlet pipeline;

[0012] A refrigeration system, which provides heat exchange liquid to at least one of the first heat exchanger and the second heat exchanger connected in parallel, and recovers the heat exchange liquid after heat exchange.

[0013] Further, the refrigeration system is a water-cooled air-conditioning system.

[0014] Further, at least one set of heaters is provided on the water supply pipeline of the water-cooled air-conditioning system for providing heat exchange liquid to the first heat exchanger and the second heat exchanger.

[0015] Further, a supply pump and a check valve are successively provided on the return water pipeline of the water-cooled air-conditioning system for recovering the heat exchange liquid after heat exchange according to the return liquid direction.

[0016] Further, it further includes a control module and an environmental temperature detection device for detecting the outdoor environmental temperature. The control module controls the refrigeration system to provide cooling liquid to the first heat exchanger and / or the second heat exchanger, and the temperature of the cooling liquid according to the outdoor environmental temperature.

[0017] Further, when the outdoor environmental temperature detected by the environmental temperature detection device is within the first temperature range, the control module controls the refrigeration system to provide cooling liquid to the first heat exchanger and the second heat exchanger, the fan of the first heat exchanger is turned on, and the condensation fan and the supply pump of the refrigeration system operate at the maximum frequency range.

[0018] Further, when the outdoor ambient temperature detected by the ambient temperature detection device is within the second temperature range, the control module controls the refrigeration system to supply coolant to the first heat exchanger and the second heat exchanger, turns on the fan of the first heat exchanger, and the maximum frequency of the compressor of the refrigeration system is less than the maximum frequency of the compressor when within the first temperature range, and the second temperature range is less than the first temperature range.

[0019] Further, when the outdoor ambient temperature detected by the ambient temperature detection device is within the third temperature range, the control module controls the refrigeration system to supply coolant only to the second heat exchanger, turns on the fan of the first heat exchanger, the maximum frequency of the compressor of the refrigeration system is less than the frequency of the compressor when within the second temperature range, and the frequency of the condensing fan and the liquid supply pump of the refrigeration system is less than the frequency of the condensing fan and the liquid supply pump when within the first temperature range, and the third temperature range is less than the second temperature range.

[0020] Further, when the outdoor ambient temperature detected by the ambient temperature detection device is within the fourth temperature range, and the fourth temperature range is less than the third temperature range, the control module controls the fan of the first heat exchanger to turn off, controls the refrigeration system to supply coolant only to the second heat exchanger, and according to the range of the difference between the temperature of the coolant and the target temperature, controls the maximum frequencies of the condensing fan, the compressor, and the liquid supply pump of the refrigeration system to be less than the maximum frequencies of the condensing fan, the compressor, and the liquid supply pump when within the second temperature range;

[0021] or turns on the corresponding number of heaters, and controls the maximum frequencies of the condensing fan, the compressor, and the liquid supply pump of the refrigeration system to be less than the maximum frequencies of the condensing fan, the compressor, and the liquid supply pump when within the second temperature range;

[0022] or turns on all heaters, controls the condensing fan and the compressor of the refrigeration system to turn off, and the frequency of the liquid supply pump is less than the frequency of the liquid supply pump when within the second temperature range.

[0023] The energy storage cabinet compartment proposed by the present utility model includes the temperature regulation system of the energy storage cabinet compartment described in the above technical solution.

[0024] The utility model is provided with heat exchangers at both the energy storage cabinet compartment and the energy storage battery, which can effectively balance the temperature field inside the energy storage cabinet and avoid excessive temperature difference between the energy storage cabinet compartment and the battery pack. Moreover, when the utility model exchanges heat with the energy storage battery, a liquid cooling method is adopted, which can effectively reduce the noise during cooling. To further save energy, the utility model is also provided with a fan at the first heat exchanger. When the outdoor ambient temperature is relatively low, the relatively low-temperature air inside the energy storage cabinet compartment can be used to further dissipate heat from the energy storage battery, reducing the power consumption of the refrigeration system. In addition, the utility model is also provided with a heater, which can ensure the normal operation of the energy storage battery within the full ambient temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present utility model will be described in detail below with reference to the embodiments and the drawings, wherein:

[0026] Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0027] Figure 2 is a schematic structural diagram of another embodiment of the present utility model.

[0028] DESCRIPTION OF THE REFERENCE NUMERALS:

[0029] 1. First heat exchanger; 2. Fan; 3. Second heat exchanger; 4. Energy storage cabinet compartment; 5. Energy storage battery; 6. First inlet valve; 7. Second outlet valve; 8. First outlet valve;

[0030] 9. Second outlet valve; 10. Liquid supply pump; 11. Check valve; 12. Compressor; 13. Plate heat exchanger; 14. Condensing fan; 15. Heater. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] Therefore, a feature pointed out in this specification will be used to illustrate one of the features of one embodiment of the present utility model, rather than implying that each embodiment of the present utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features may be combined together to show a possible system design, these features can also be used in other combinations that are not explicitly described. Therefore, unless otherwise stated, the described combination is not intended to be limiting.

[0033] The energy storage system described in the present utility model mainly adopts a liquid cooling unit. The liquid cooling system utilizes the high specific heat capacity and thermal conductivity of the coolant, which can remove a large amount of heat in a short time and effectively control the temperature of the battery pack. Especially under high-temperature working conditions, the advantages of the liquid cooling system are more obvious. However, the present utility model does not only adopt the liquid cooling system. The present utility model also sets up a fan to cooperate the liquid system with the air cooling and adjust according to different application situations. The technical solution of the present utility model will be described in detail below.

[0034] The temperature regulation system of the energy storage cabinet compartment of the present utility model includes a first heat exchanger, a second heat exchanger, and a refrigeration system. Strictly speaking, the first heat exchanger and the second heat exchanger also belong to a part of the refrigeration system. For the convenience of description, the present utility model takes the refrigeration system as a module that actively provides a heat exchange liquid at a suitable temperature, and the first heat exchanger and the second heat exchanger as a module that exchanges heat with the target carrier (such as a battery) to introduce. That is, the refrigeration system is similar to the outdoor unit part of an air-conditioning system, and the first heat exchanger and the second heat exchanger are similar to the indoor unit part of an air-conditioning system.

[0035] The first heat exchanger is provided with a fan. The first heat exchanger and its fan are arranged in the energy storage cabinet compartment and are used for exchanging heat with the air in the energy storage cabinet compartment. The first heat exchanger is provided with an inlet pipeline and an outlet pipeline, and a first inlet valve and a first outlet valve are respectively arranged on the inlet pipeline and the outlet pipeline of the first heat exchanger.

[0036] The second heat exchanger exchanges heat with the battery pack in the energy storage cabinet compartment. The second heat exchanger is also provided with an inlet pipeline and an outlet pipeline, and a second inlet valve and a second outlet valve are respectively arranged on the inlet pipeline and the outlet pipeline of the second heat exchanger.

[0037] The first heat exchanger and the second heat exchanger are connected in parallel.

[0038] The refrigeration system provides heat exchange liquid to at least one of the first heat exchanger and the second heat exchanger connected in parallel and recovers the heat exchange liquid after heat exchange.

[0039] In addition to regulating the temperature of the energy storage battery, the present utility model also sets up a heat exchanger in the energy storage cabinet compartment, which can reduce the temperature difference between the energy storage battery and the energy storage cabinet compartment and can effectively balance the temperature field in the energy storage cabinet compartment.

[0040] In a specific embodiment, the refrigeration system of the present utility model is a water-cooled air-conditioning system. Figure 1The specific structural schematic diagram of a refrigeration system of the present utility model is given. In this embodiment, the water-cooled air-conditioning system includes a compressor 12, a condenser, an electronic expansion valve, and a plate heat exchanger 13. When it is necessary to use the heat exchange liquid for cooling, after the water outlet of the plate heat exchanger 13 passes through the water outlet pipeline, by controlling the opening and closing of the first inlet valve 6, the second inlet valve 7, the first outlet valve 8, and the second outlet valve 9, the water outlet of the plate heat exchanger 13 will flow to at least one of the first heat exchanger 1 and the second heat exchanger 3.

[0041] The present utility model adopts a water-cooled air-conditioning system. The pipelines for heat exchange with the energy storage battery and the energy storage cabinet compartment are all filled with water. Even if there is liquid leakage, it is relatively safe for the current energy storage system and much safer than direct refrigerant heat exchange.

[0042] As Figure 2 shown, in one embodiment, the water-cooled air-conditioning system includes a compressor 12, a condenser, an electronic expansion valve, and a plate heat exchanger 13. When it is necessary to use the heat exchange liquid for cooling, after the water outlet of the plate heat exchanger 13 passes through the water outlet pipeline, by controlling the opening and closing of the first and second inlet valves 7 and the first and second outlet valves 9, the water outlet of the plate heat exchanger 13 will flow to at least one of the first heat exchanger 1 and the second heat exchanger 3. Moreover, at least one set of heaters 15 is provided on the water supply pipeline for the water-cooled air-conditioning system to supply the heat exchange liquid to the first heat exchanger 1 and the second heat exchanger 3. The first and second inlet valves 7 and the first and second outlet valves 9 can be electric two-way valves or other types of valves.

[0043] Although the energy storage battery 5 generates heat during operation, in order to enable the energy storage system to adapt to a wider temperature range, at least one set of heaters 15 is provided on the water supply pipeline to achieve this purpose.

[0044] In one embodiment, a liquid supply pump 10 and a check valve 11 are sequentially provided on the return water pipeline for the water-cooled air-conditioning system to recover the heat exchange liquid according to the return liquid direction.

[0045] When the heat exchange demand of the energy storage battery 5 and / or the energy storage cabinet compartment 4 is high, by increasing the frequency of the liquid supply pump 10, the heat exchange efficiency can be improved. Conversely, when the heat exchange demand of the energy storage battery 5 and / or the energy storage cabinet compartment 4 is low, the frequency of the liquid supply pump 10 can be reduced.

[0046] In one embodiment, the temperature regulation system of the energy storage cabinet compartment 4 of the present utility model further includes a control module and an ambient temperature detection device.

[0047] The ambient temperature detection device is used to detect the outdoor ambient temperature.

[0048] The control module controls the refrigeration system to supply coolant to the first heat exchanger 1 and / or the second heat exchanger 3, as well as the temperature of the coolant, according to the outdoor ambient temperature. That is to say, the control module controls the first inlet valve 6, the first outlet valve 8, the second inlet valve 7, the second outlet valve 9, the fan 2, the liquid supply pump 10, the heater 15, the frequency of the compressor 12 of the refrigeration system, etc., according to the outdoor ambient temperature, so as to meet the corresponding ambient temperature requirements of the energy storage system. According to different ambient temperatures, flexible and variable solutions are provided to meet the requirements of temperature control, energy saving, etc.

[0049] In some embodiments, the present utility model divides the outdoor ambient temperature into multiple temperature grades, and adopts different control strategies in different temperature units. The following introduces the temperature units and their corresponding control strategies.

[0050] In one embodiment, when the outdoor ambient temperature detected by the ambient temperature detection device is within the first temperature range, the first temperature range is a highest temperature range. In this temperature range, the outdoor ambient temperature is very high, which is not conducive to the heat dissipation of the energy storage battery. At this time, the control module controls the refrigeration system to supply coolant to the first heat exchanger and the second heat exchanger, so that the temperature of both the energy storage battery and the energy storage cabinet compartment can be effectively reduced. At the same time, the control module controls the fan of the first heat exchanger to turn on, and quickly diffuses the lower temperature air in the energy storage cabinet compartment to every corner of the energy storage cabinet compartment, avoiding an uneven temperature field. At the same time, the control module also controls the condensing fan and the liquid supply pump of the refrigeration system to operate within the maximum frequency range. The maximum frequency of the compressor is also very high within this temperature range, but the compressor frequency needs to be adjusted according to the temperature of the coolant. When the coolant reaches the target temperature, the compressor reduces its frequency or stops.

[0051] Within this temperature range, the present utility model combines liquid cooling and air cooling modes to reduce the temperature of the battery pack, effectively alleviating the cooling pressure.

[0052] In one embodiment, when the outdoor ambient temperature detected by the ambient temperature detection device is within the second temperature range, the second temperature range is smaller than the first temperature range. That is to say, the current temperature is relatively high, but not as hot as the first temperature range. At this time, the control module also controls the refrigeration system to supply coolant to the first heat exchanger and the second heat exchanger, and controls the fan of the first heat exchanger to turn on. At this time, the maximum frequency of the compressor of the refrigeration system is less than the maximum frequency of the compressor within the first temperature range.

[0053] Within this temperature range, priority is given to improving the cooling effect by increasing the air volume by increasing the frequency of the condenser fan and increasing the water flow by increasing the frequency of the variable-frequency liquid supply pump, and keeping the compressor running at medium and low frequencies to reduce the overall energy consumption of the machine.

[0054] In one embodiment, when the outdoor ambient temperature detected by the ambient temperature detection device is within the third temperature range, and the third temperature range is smaller than the second temperature range, at this time the outdoor ambient temperature is relatively low. The control module controls the refrigeration system to supply coolant only to the second heat exchanger, then controls the fan of the first heat exchanger to turn on. The maximum frequency of the compressor of the refrigeration system is less than the frequency of the compressor when the temperature is within the second temperature range, and the frequencies of the condensing fan and the liquid supply pump of the refrigeration system are less than the frequencies of the condensing fan and the liquid supply pump when the temperature is within the first temperature range.

[0055] In this embodiment, since the ambient temperature is not high, the compressor of the refrigeration system operates at a reduced frequency to lower the temperature in the energy storage cabinet compartment. Mainly, the fan in the energy storage cabinet compartment is controlled to provide a relatively low ambient temperature for the energy storage battery, thereby achieving an energy-saving effect.

[0056] In one embodiment, the outdoor ambient temperature detected by the ambient temperature detection device is within the fourth temperature range, and the fourth temperature range is smaller than the third temperature range. When the outdoor ambient temperature is within the fourth temperature range, this belongs to an ultra-low temperature environment. The control module controls the fan of the first heat exchanger to turn off, controls the refrigeration system to supply coolant only to the second heat exchanger, and accordingly controls other components based on the range of the difference between the coolant temperature and the target temperature. This part of the control includes the following several types.

[0057] Control the maximum frequencies of the condensing fan, compressor, and liquid supply pump of the refrigeration system to be less than the maximum frequencies of the condensing fan, compressor, and liquid supply pump when the temperature is within the second temperature range;

[0058] Or the control module turns on the corresponding number of heaters and controls the maximum frequencies of the condensing fan, compressor, and liquid supply pump of the refrigeration system to be less than the maximum frequencies of the condensing fan, compressor, and liquid supply pump when the temperature is within the second temperature range;

[0059] Or the control module turns on all heaters and controls the condensing fan and compressor of the refrigeration system to turn off, and the frequency of the liquid supply pump to be less than the frequency of the liquid supply pump when the temperature is within the second temperature range.

[0060] For each of the above control cases, the difference between the temperature of the coolant and the target temperature is larger than that of the previous case. Through specific control, it is possible to avoid the repeated switching of the electric heating at the critical temperature point. When multiple groups of electric heaters are turned on, after the supply liquid temperature rises back to the target value +Δt °C, then turn them off one by one. Δt can take the value of 1, and those skilled in the art can also adjust it according to the situation.

[0061] The following takes a specific control embodiment to illustrate the specific control idea of the control module of the present invention for each component.

[0062] When the outdoor ambient temperature satisfies 35 < outdoor ambient temperature ≤ 50°C, this is the first temperature range, indicating that the energy storage battery in the energy storage cabinet compartment is operating at a high load. At this time, open the first inlet valve and the first outlet valve of the first heat exchanger, and open the second inlet valve and the second outlet valve of the second heat exchanger. The refrigeration system gives priority to ensuring that the temperature of the energy storage battery does not exceed the maximum temperature limit. The condenser fan of the refrigeration system runs at full speed and maintains high-frequency operation, and the variable-frequency liquid supply pump maintains high-frequency operation. The frequency of the compressor is adjusted up and down according to the temperature of the coolant, but the maximum frequency in this temperature range can reach high frequency.

[0063] When the ambient temperature is high, the ambient temperature in the energy storage cabinet compartment is high, and the balanced temperature control pressure is relatively large. Therefore, in this case, the cold air can be sent to all corners of the energy storage cabinet compartment through the fan of the first heat exchanger to synchronously cool the ambient temperature in the energy storage cabinet compartment. Its effect is equivalent to air cooling + liquid cooling, reducing the cooling pressure of the energy storage battery.

[0064] When the outdoor ambient temperature satisfies 10 < outdoor ambient temperature ≤ 35°C, this is the second temperature range, and the energy storage cabinet is operating at a relatively high load. At this time, the refrigeration system enters the energy-saving operation mode, and the control target of the unit is still the temperature of the coolant. At this time, the temperature inside the energy storage cabinet compartment is not very high. It can be considered to always keep the surface temperature of the battery pack at -2 to 3°C below the maximum temperature limit. Priority is given to improving the cooling effect by increasing the frequency of the condenser fan to increase the air volume and increasing the frequency of the variable-frequency liquid supply pump to increase the water flow, that is, the condenser fan and the liquid supply pump run at high frequency, and the compressor runs at medium and low frequency to reduce the overall energy consumption of the machine. That is to say, the maximum frequency of the compressor at this time is less than the maximum frequency of the compressor in the first temperature range.

[0065] When the outdoor ambient temperature satisfies -15 < outdoor ambient temperature ≤ 10°C, this is the third temperature range, and the control target of the unit is still the liquid supply temperature. At this time, the temperature inside the energy storage cabinet compartment is relatively low. It can be considered to always keep the surface temperature of the energy storage battery at -2 to 3°C below the maximum temperature limit. At this time, close the first inlet valve and the first outlet valve of the first heat exchanger, only supply coolant to the second heat exchanger, and turn on the fan of the first heat exchanger to allow the air in the compartment to circulate, and use natural wind to assist in air-cooling the energy storage battery. The unit of the refrigeration system synchronously gives priority to reducing the frequency of the compressor. On the premise of ensuring that the temperature of the coolant is within the control range, the compressor operates at low frequency, the frequency of the liquid supply pump is reduced to medium and low frequency, and the frequency of the condenser fan is adjusted according to the change of the high-pressure pressure and is also at medium and low frequency.

[0066] When the outdoor ambient temperature satisfies -30 < outdoor ambient temperature ≤ -15°C, this is the fourth temperature range. At this time, the temperature inside the energy storage cabinet compartment is low. It can be considered to always maintain the surface temperature of the energy storage battery at the minimum temperature limit +2 to 3°C. At this time, close the first inlet valve and the first outlet valve of the first heat exchanger, as well as the fan. The unit synchronously gives priority to reducing the compressor frequency. On the premise of ensuring that the coolant temperature is within the control range, the compressor operates at a low frequency, the liquid supply pump frequency operates at a low frequency, and the condenser fan frequency operates at a low frequency. When the liquid supply temperature rises, appropriately increase the operating frequency of the condenser fan or the liquid supply pump. When the coolant temperature drops, turn on the electric heater of the unit.

[0067] When the target value -2°C < coolant temperature ≤ the target value, the compressor, fan, and liquid supply pump operate at low frequencies, and the electric heating is turned off.

[0068] When the target value -3°C < coolant temperature ≤ the target value - 2°C, the compressor, fan, and variable-frequency liquid supply pump operate at low frequencies, and one group of electric heating is turned on.

[0069] When the target value -4°C < coolant temperature ≤ the target value - 3°C, the compressor, fan, and variable-frequency liquid supply pump operate at low frequencies, and two groups of electric heating are turned on.

[0070] When the coolant temperature ≤ the target value - 4°C, the compressor and fan are turned off, the electric heating is fully turned on, and the variable-frequency liquid supply pump operates at medium and low frequencies.

[0071] This avoids the repeated switching of the electric heating at the critical temperature point. When multiple groups of electric heating are turned on, turn them off one by one after the liquid supply temperature rises back to the target value +1°C.

[0072] In this detailed application example, the specific temperature ranges for all temperature segmented controls can be adjusted by those skilled in the art according to needs. Similarly, the difference between the coolant temperature and the target value can also be adjusted. The coolant temperature referred to in the present invention is the temperature of the coolant supplied to the first heat exchanger and / or the second heat exchanger.

[0073] Through the description of the above specific application example, it can be seen that the applicable ambient temperature range of the temperature regulation system of the present invention is wide (-30°C to 50°C), and the unit components include a compressor, a variable-frequency liquid supply pump, a fan, and an electric heater. To reduce the energy consumption of the energy storage cabinet, the temperature regulation system needs to operate energy-efficiently within the full ambient temperature range. The control target is the surface temperature of the energy storage battery. When there are multiple energy storage battery packs, the highest temperature and the lowest temperature are mainly controlled. At the same time, it is necessary to detect the ambient dew point temperature of the energy storage cabinet compartment to control that the energy storage battery does not condense. Implement energy-saving strategies in segments according to different ambient temperature and humidity, so as to achieve energy-saving and noise reduction in the full temperature range.

[0074] The present utility model also protects an energy storage cabinet compartment, which adopts the temperature regulation system of the energy storage cabinet compartment of the above technical solution.

[0075] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A temperature regulation system for a storage cabinet compartment, characterized in that, Comprising: A first heat exchanger, which is provided with a fan and is used for exchanging heat with the air in the energy storage cabinet compartment. A first inlet valve and a first outlet valve are respectively arranged on its inlet pipeline and outlet pipeline; A second heat exchanger, which exchanges heat with the battery pack in the energy storage cabinet compartment. A second inlet valve and a second outlet valve are respectively arranged on its inlet pipeline and outlet pipeline; A refrigeration system, which provides heat exchange liquid to at least one of the first heat exchanger and the second heat exchanger connected in parallel, and recovers the heat exchange liquid after heat exchange.

2. The temperature regulation system of the energy storage cabinet compartment according to claim 1, characterized in that The refrigeration system is a water-cooled air-conditioning system.

3. The temperature regulation system of the energy storage cabinet compartment according to claim 2, characterized in that, At least one set of heaters is arranged on the water supply pipeline of the water-cooled air-conditioning system for providing heat exchange liquid to the first heat exchanger and the second heat exchanger.

4. The temperature regulation system of the energy storage cabinet compartment according to claim 2, characterized in that, A liquid supply pump and a check valve are successively arranged on the water return pipeline of the water-cooled air-conditioning system for recovering the heat exchange liquid after heat exchange according to the liquid return direction.

5. The temperature regulation system for the energy storage cabinet compartment according to any one of claims 1 to 4, characterized in that It further includes a control module and an ambient temperature detection device for detecting the outdoor ambient temperature. The control module controls the refrigeration system to provide cooling liquid to the first heat exchanger and / or the second heat exchanger, and the temperature of the cooling liquid according to the outdoor ambient temperature.

6. The temperature regulation system for the energy storage cabinet compartment according to claim 5, characterized in that, When the outdoor ambient temperature detected by the ambient temperature detection device is within the first temperature range, the control module controls the refrigeration system to provide cooling liquid to the first heat exchanger and the second heat exchanger, the fan of the first heat exchanger is turned on, and the condensing fan and the liquid supply pump of the refrigeration system operate at the maximum frequency range.

7. The temperature regulation system of the energy storage cabinet compartment according to claim 6, characterized in that, When the outdoor ambient temperature detected by the ambient temperature detection device is within the second temperature range, the control module controls the refrigeration system to provide cooling liquid to the first heat exchanger and the second heat exchanger, the fan of the first heat exchanger is turned on, the maximum frequency of the compressor of the refrigeration system is less than the maximum frequency of the compressor when it is within the first temperature range, and the second temperature range is less than the first temperature range.

8. The temperature regulation system of the energy storage cabinet compartment according to claim 7, characterized in that, When the outdoor ambient temperature detected by the ambient temperature detection device is within the third temperature range, the control module controls the refrigeration system to only provide cooling liquid to the second heat exchanger, the fan of the first heat exchanger is turned on, the maximum frequency of the compressor of the refrigeration system is less than the frequency of the compressor when it is within the second temperature range, and the condensing fan and the liquid supply pump of the refrigeration system are less than the frequencies of the condensing fan and the liquid supply pump when it is within the first temperature range. The third temperature range is less than the second temperature range.

9. The temperature regulation system of the energy storage cabinet compartment according to claim 8, characterized in that, When the outdoor ambient temperature detected by the ambient temperature detection device is within the fourth temperature range, the fourth temperature range is less than the third temperature range, the control module controls the fan of the first heat exchanger to be turned off, controls the refrigeration system to only provide cooling liquid to the second heat exchanger, and according to the range of the difference between the temperature of the cooling liquid and the target temperature, controls the maximum frequencies of the condensing fan, the compressor and the liquid supply pump of the refrigeration system to be less than the maximum frequencies of the condensing fan, the compressor and the liquid supply pump when it is within the second temperature range; or Turn on the corresponding number of heaters, and control the maximum frequencies of the condensing fan, the compressor and the liquid supply pump of the refrigeration system to be less than the maximum frequencies of the condensing fan, the compressor and the liquid supply pump when it is within the second temperature range; or Turn on all heaters, control the condensation fan and compressor of the refrigeration system to be turned off, and the frequency of the liquid supply pump is less than the frequency of the liquid supply pump when in the second temperature range.

10. A storage cabinet compartment, characterized in that, It includes a temperature regulation system for the energy storage cabinet compartment as described in any one of claims 1 to 9.

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