Energy storage system

Abstract

The utility model discloses an energy storage system which comprises a box body, a temperature control system, a battery module and an energy storage converter, the temperature control system is installed in the box body, the temperature control system comprises a battery heat management module and a converter heat management module, the battery heat management module is provided with a battery circulation liquid path, and the converter heat management module is provided with a converter. The converter heat management module is provided with a converter circulating liquid path, the battery module is installed in the box body, the battery circulating liquid path passes through the battery module to exchange heat with the battery module, the energy storage converter is installed in the box body and located at the bottom of the battery module, and the converter circulating liquid path penetrates through the energy storage converter to exchange heat with the energy storage converter. The energy storage system has the advantages of being high in integration degree, good in heat dissipation effect, capable of reducing energy consumption, construction amount and cost and the like.

Description

Technical Field

[0001] This utility model relates to the field of liquid-cooled energy storage systems, and in particular to an energy storage system. Background Technology

[0002] The energy storage systems in related technologies are equipped with energy storage converters. These converters are centrally located and generate significant heat during operation. The heat dissipation method for the energy storage converters is air cooling, which can prevent the system from operating at full power when the ambient temperature is too high. Furthermore, the battery modules and energy storage converters need to be installed separately, requiring wiring connections and installation, increasing construction difficulty. If the energy storage converters and battery modules are centrally located, the different heat dissipation methods will limit space constraints, making it impossible to meet the combined heat dissipation requirements of both the battery modules and the energy storage converters. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide an energy storage system that has advantages such as high integration, good heat dissipation, reduced energy consumption, and reduced construction work and costs.

[0004] To achieve the above objectives, a first aspect of this utility model provides an energy storage system, comprising: a housing; a temperature control system installed within the housing, the temperature control system comprising: a battery thermal management module having a battery circulating fluid circuit; a converter thermal management module having a converter circulating fluid circuit; a battery module installed within the housing, the battery circulating fluid circuit passing through the battery module for heat exchange; and an energy storage converter installed within the housing and located at the bottom of the battery module, the converter circulating fluid circuit passing through the energy storage converter for heat exchange.

[0005] The energy storage system proposed according to the embodiments of this utility model has advantages such as high integration, good heat dissipation, reduced energy consumption, reduced construction workload and cost.

[0006] In some embodiments of this utility model, the battery thermal management module includes: a battery temperature control module, wherein the battery circulating fluid circuit is formed in the battery temperature control module; and a refrigerant heat dissipation module, wherein the refrigerant heat dissipation module is connected to the battery temperature control module to absorb the heat of the battery circulating fluid circuit.

[0007] In some embodiments of this utility model, the refrigerant heat dissipation module is provided with a refrigerant circulation liquid path and includes: a compressor, the compressor driving refrigerant to flow in the refrigerant circulation liquid path; a first heat exchanger, the first heat exchanger being connected to the side of the refrigerant circulation liquid path adjacent to the battery temperature control module, to absorb heat from the battery circulation liquid path; and a second heat exchanger, the second heat exchanger being connected to the side of the refrigerant circulation liquid path away from the battery temperature control module, to release the absorbed heat from the battery circulation liquid path.

[0008] In some embodiments of this utility model, the converter circulating fluid circuit includes: a water pump that drives coolant to flow in the converter circulating fluid circuit; a third heat exchanger connected to the side of the converter circulating fluid circuit adjacent to the battery temperature control module, so that the battery circulating fluid circuit absorbs heat from the converter circulating fluid circuit; and a fourth heat exchanger connected to the side of the converter circulating fluid circuit away from the battery temperature control module to release heat from the converter circulating fluid circuit.

[0009] In some embodiments of this utility model, the energy storage system further includes: an electrical system installed inside the housing, the electrical system being adjacent to the battery module and located on the side of the housing; and a heat pipe heat exchanger having an evaporation section and a condensation section, the evaporation section of the heat pipe heat exchanger being connected to the converter circulating liquid circuit to absorb heat from the converter circulating liquid circuit, and the condensation section of the heat pipe heat exchanger being connected to the electrical system to heat the electrical system.

[0010] In some embodiments of this utility model, the electrical system includes: an uninterruptible power supply (UPS), wherein the condenser section of the heat pipe heat exchanger is connected to the UPS to heat the UPS.

[0011] In some embodiments of this utility model, the heat pipe heat exchanger includes: a heat pipe, one end of which forms the evaporation section and the other end of which forms the condensation section; a plurality of fins, each fin surrounding the outer peripheral surface of the heat pipe and perpendicular to the axis of the heat pipe, the plurality of fins being spaced apart along the length direction of the heat pipe; and a partition, the partition surrounding the outer peripheral surface of the heat pipe and parallel to the fins, the partition separating the condensation section and the evaporation section.

[0012] In some embodiments of this utility model, the battery temperature control module includes: a battery heater, which is connected to the battery circulating fluid circuit and is used to heat the coolant in the battery circulating fluid circuit.

[0013] In some embodiments of this utility model, the battery module includes multiple battery cells, each battery cell is arranged in a column, and different battery cells are arranged side by side in the housing; the energy storage converter includes multiple converter units, each column of battery cells corresponds to one converter unit, and the converter unit is located at the bottom of the same column of battery cells.

[0014] In some embodiments of this utility model, each column of battery cells includes a multi-layer battery pack, and the battery circulation fluid circuit passes through each battery pack in sequence.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a system schematic diagram of an energy storage system according to an embodiment of the present invention;

[0018] Figure 2 This is a side view of an energy storage system according to an embodiment of the present invention;

[0019] Figure 3 This is a front view of an energy storage system according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of a heat pipe heat exchanger according to an embodiment of the present invention;

[0021] Figure 5 This is a top view of an energy storage system according to an embodiment of the present invention;

[0022] Figure 6 This is a front view of another energy storage system according to one embodiment of the present invention;

[0023] Figure label:

[0024] Energy storage system 1;

[0025] 11. Housing; 12. Temperature control system; 13. Battery module; 14. Energy storage converter; 15. Electrical system; 16. Heat pipe heat exchanger.

[0026] Battery thermal management module 21, inverter thermal management module 22

[0027] Battery temperature control module 31, refrigerant heat dissipation module 32

[0028] Compressor 321, First heat exchanger 322, Second heat exchanger 323

[0029] Water pump 221, third heat exchanger 222, fourth heat exchanger 223

[0030] Gas-liquid separator 41, dryer filter 42, liquid receiver 43, first expansion tank 44, water tank 45

[0031] Battery coolant pump 46, second expansion valve 47

[0032] Battery unit 131, inverter unit 141

[0033] Uninterruptible power supply (UPS) 151, heat pipe 161, multiple fins 162, baffle 163, evaporator section 17, condenser section 18.

[0034] Battery heater 311. Detailed Implementation

[0035] The energy storage system according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0036] like Figures 1-6 As shown in the figure, this utility model embodiment proposes an energy storage system. The energy storage system 1 includes a housing 11, a temperature control system 12, a battery module 13, and an energy storage converter 14. The temperature control system 12 is installed inside the housing 11 and includes a battery thermal management module 21 and a converter thermal management module 22. The battery thermal management module 21 has a battery circulating fluid circuit. The converter thermal management module 22 has a converter circulating fluid circuit. The battery module 13 is installed inside the housing 11, and the battery circulating fluid circuit passes through the battery module 13 for heat exchange. The energy storage converter 14 is installed inside the housing 11 and located at the bottom of the battery module 13. The converter circulating fluid circuit passes through the energy storage converter 14 for heat exchange.

[0037] For example, the battery circulating fluid circuit and the inverter circulating fluid circuit can be connected to the same water tank 45, forming a dual circulating fluid circuit. The coolant in the battery circulating fluid circuit flows through each battery pack in the battery module 13 to exchange heat with the battery module 13, enabling heat dissipation on the battery module 13 side. The inverter thermal management module 22 is equipped with an inverter circulating fluid circuit, and the coolant in the inverter circulating fluid circuit flows through each energy storage inverter 14 to exchange heat with the energy storage inverter 14, enabling heat dissipation on the energy storage inverter 14 side. The energy storage inverter 14 can control the charging and discharging process of the battery module 13, performing AC / DC conversion.

[0038] According to the energy storage system 1 proposed in this embodiment, the temperature control system 12, battery module 13 and energy storage converter 14 are all installed in the housing 11. The energy storage system 1 directly integrates the temperature control system 12, battery module 13 and energy storage converter 14 in the housing 11, which reduces the amount of construction work between the AC and DC ends of the battery module 13 and the energy storage converter 14, and eliminates the need to set up a separate cabinet for the energy storage converter 14, thereby improving the overall energy density of the energy storage system 1. The system includes a battery circulating fluid path via the battery thermal management module 121, which exchanges heat with the battery module 13. Similarly, an inverter circulating fluid path via the inverter thermal management module 122 passes through the energy storage inverter 14 for heat exchange. Both the battery module 13 and the energy storage inverter 14 utilize liquid cooling, forming a dual-circulation fluid path. Finally, the heat from both the battery and inverter circulating fluid paths is dissipated. Compared to air cooling for the energy storage inverter 14, this dual-circulation fluid path effectively meets the heat dissipation requirements of the energy storage system 1 within a limited space, resulting in better heat dissipation.

[0039] Furthermore, by installing the energy storage converter 14 and the battery module 13 together in the same enclosure 11, the integration level is higher. For example, the enclosures of the battery module 13 and the energy storage converter 14 can be supplied by the same supplier, which reduces the cost of the energy storage system 1. In addition, when the energy storage system 1 has product problems, it also avoids the problem of shirking responsibility due to the division of duties.

[0040] Therefore, the energy storage system 1 according to the present invention has advantages such as high integration, good heat dissipation, reduced energy consumption, reduced construction work and cost.

[0041] In some embodiments of this utility model, the battery thermal management module 21 includes a battery temperature control module 31 and a refrigerant heat dissipation module 32. The battery circulating fluid circuit is formed in the battery temperature control module 31, and the refrigerant heat dissipation module 32 is connected to the battery temperature control module 31 to absorb the heat of the battery circulating fluid circuit.

[0042] During operation, battery module 13 releases a large amount of heat. As the coolant flows through the battery circulation circuit, it carries away the heat from battery module 13. At this time, the temperature of the coolant in the battery circulation circuit rises. The refrigerant heat dissipation module 32, connected to the battery circulation circuit, carries away the heat from the coolant, allowing the coolant to return to a low temperature. The low-temperature coolant then flows back to the battery circulation circuit to cool battery module 13.

[0043] In some embodiments of this utility model, such as Figure 1As shown, the refrigerant heat dissipation module 32 is provided with a refrigerant circulation path and includes a compressor 321, a first heat exchanger 322, and a second heat exchanger 323. Furthermore, the refrigerant circulation path can also be connected to a gas-liquid separator 41, a dryer filter 42, a liquid receiver 43, etc. The compressor 321 drives the refrigerant to flow in the refrigerant circulation path. The first heat exchanger 322 is connected to the side of the refrigerant circulation path adjacent to the battery temperature control module 31 to absorb heat from the battery circulation path. The second heat exchanger 323 is connected to the side of the refrigerant circulation path away from the battery temperature control module 31 to release the absorbed heat from the battery circulation path.

[0044] The first heat exchanger 322 can be a plate heat exchanger, and the second heat exchanger 323 can be a condenser. The coolant in the battery circulation circuit exchanges heat with the battery module 13 and then with the first heat exchanger 322. The first heat exchanger 322 absorbs heat from the battery circulation circuit, and then the refrigerant circulation circuit of the first heat exchanger 322 passes through it and is transported to the second heat exchanger 323, where the second heat exchanger 323 dissipates the heat absorbed by the first heat exchanger 322.

[0045] Specifically, the coolant exchanges heat through the first heat exchanger 322. The high-temperature coolant transfers heat to the refrigerant cooling module 32 via the first heat exchanger 322. Inside the refrigerant circulation circuit of the refrigerant cooling module 32, the liquid refrigerant absorbs heat and becomes gaseous. The gaseous refrigerant is then compressed by the compressor 321 into a high-temperature, high-pressure gaseous refrigerant, which then enters the second heat exchanger 323 to transfer heat to the external environment. The cooled refrigerant becomes liquid again and flows back into the first heat exchanger 322, thus completing the circulation of the refrigerant system. The coolant, now at a low temperature after exchanging heat with the first heat exchanger 322, continues to enter the battery circulation circuit to exchange heat with the battery cells of the battery module 13, thus completing the circulation operation.

[0046] Furthermore, in some embodiments, the thermal management on the battery module 13 side can operate with the following strategy: to avoid repeated start-stop of the compressor 321, the outlet water temperature can be set to 22°C, and the cooling hysteresis can be set to 3°C, which can extend the service life of the compressor 321. When the temperature probe at the outlet of the battery circulating fluid circuit detects a water temperature greater than or equal to 25°C, the compressor 321 starts to cool; when the outlet water temperature is lower than 22°C, the compressor 321 stops cooling; in low-temperature conditions, when the outlet water temperature is less than or equal to 15°C, the battery heater 311 starts to work, and when the water temperature is greater than 18°C, the battery heater 311 stops heating.

[0047] In some embodiments of this utility model, the converter circulating fluid circuit includes a water pump 221, a third heat exchanger 222, and a fourth heat exchanger 223. The water pump 221 drives the coolant to flow in the converter circulating fluid circuit. The third heat exchanger 222 is connected to the side of the converter circulating fluid circuit adjacent to the battery temperature control module 31 so that the battery circulating fluid circuit absorbs the heat of the converter circulating fluid circuit. The fourth heat exchanger 223 is connected to the side of the converter circulating fluid circuit away from the battery temperature control module 31 so as to release the heat of the converter circulating fluid circuit.

[0048] The third heat exchanger 222 can be a plate heat exchanger, and the fourth heat exchanger 223 can be a dry cooler. During operation, the energy storage converter 14 releases a large amount of heat. The coolant in the converter's circulating fluid circuit absorbs this heat and urgently needs to dissipate it. The water pump 221 provides the power source for the coolant flow. The coolant in the battery circulating fluid circuit, after being cooled by the refrigerant cooling module 32, continues to flow in the battery circulating fluid circuit. Because the refrigerant cooling module 32 performs heat exchange on the coolant, the coolant is at a low temperature at this time. Then, the low-temperature coolant exchanges heat with the high-temperature coolant in the converter's circulating fluid circuit through the third heat exchanger 222. The third heat exchanger 222 absorbs heat from the converter's circulating fluid circuit, and the high-temperature coolant, after the heat exchange, returns to a low-temperature state and continues to flow back into the converter's circulating fluid circuit to cool the energy storage converter 14.

[0049] Furthermore, the coolant in the converter's circulating fluid path, after being cooled by the third heat exchanger 222, still retains a certain amount of residual heat. By installing the fourth heat exchanger 223, the heat in the converter's circulating fluid path is further dissipated, and heat transfer to the external environment is enhanced through a fan. Even when the ambient temperature is high, such as exceeding 45°C, heat dissipation will not be insufficient. Therefore, the third heat exchanger 222 and the fourth heat exchanger 223 work together to exchange heat, ensuring good heat dissipation performance of the energy storage converter 14.

[0050] Furthermore, the thermal management operation strategy for the energy storage converter 14 side is as follows: the outlet water temperature is controlled at 55±1℃. The fan used for heat dissipation in the fourth heat exchanger 223 can be a variable frequency fan, and its speed can be controlled based on the difference between the outlet water temperature and the set value. When the fan is running at full frequency and the outlet water temperature is greater than 58℃, the third heat exchanger 222 between the battery circulating fluid circuit and the converter circulating fluid circuit starts operating. The compressor 321 provides cooling to compensate for the heat dissipation on the energy storage converter 14 side, thereby controlling the outlet water temperature on the energy storage converter 14 side below 58℃.

[0051] The system thermal management operation strategy for the battery module 13 side and the energy storage converter 14 side adopts the outlet water temperature control strategy, which can reduce the overall system failure rate. The use of frequency conversion control can reduce auxiliary power consumption.

[0052] In some embodiments of this utility model, the energy storage system 1 further includes an electrical system 15 and a heat pipe heat exchanger 16. The electrical system 15 is installed inside the housing 11 and is adjacent to the battery module 13 and located on the side of the housing 11. The heat pipe heat exchanger 16 has an evaporation section 17 and a condensation section 18. The evaporation section 17 of the heat pipe heat exchanger 16 is connected to the converter circulating liquid circuit to absorb the heat of the converter circulating liquid circuit. The condensation section 18 of the heat pipe heat exchanger 16 is connected to the electrical system 15 to heat the electrical system 15.

[0053] The electrical system 15 is housed within the electrical compartment. Heat from the circulating fluid circuit of the energy storage converter 14 is transferred to the electrical system 15 via a heat pipe heat exchanger 16. The heat generated during the operation of the energy storage converter 14 heats the electrical system 15, allowing it to operate at a comfortable ambient temperature. This process recovers waste heat from the energy storage converter 14 and reduces the auxiliary power consumption of the temperature control system 12 in heating the electrical system 15 and cooling the energy storage converter 14, thus improving the system's energy conversion efficiency. Furthermore, the elimination of the heating equipment for the electrical system 15 saves on system costs, and the reduced equipment further lowers the system's failure rate.

[0054] In some embodiments of this utility model, the electrical system 15 includes an uninterruptible power supply device 151, and the condensing section 18 of the heat pipe heat exchanger 16 is connected to the uninterruptible power supply device 151 to heat the uninterruptible power supply device 151.

[0055] Specifically, the uninterruptible power supply device 151 can use a lead-acid battery. Combined with... Figure 2 and Figure 3 As shown, the electrical system 15 is located on the outside of the enclosure 11, and the uninterruptible power supply (UPS) device 151 is located on the shelf in the middle of the electrical system 15. Compared with the traditional centralized energy storage converter 14 scheme, the additional cabinet of the energy storage converter 14 is reduced, and the overall energy density of the energy storage system 1 is improved.

[0056] In some embodiments of this utility model, the heat pipe heat exchanger 16 includes a heat pipe 161, a plurality of fins 162 and a partition 163. One end of the heat pipe 161 forms an evaporation section 17 and the other end forms a condensation section 18. Each fin 162 is surrounded around the outer peripheral surface of the heat pipe 161 and is perpendicular to the axis of the heat pipe 161. The plurality of fins 162 are arranged at intervals along the length direction of the heat pipe 161. The partition 163 is surrounded around the outer peripheral surface of the heat pipe 161 and is parallel to the fins 162. The partition 163 separates the condensation section 18 and the evaporation section 17.

[0057] Among them, the heat pipe 161 can be a heat transfer component with high thermal conductivity. After the working fluid in the evaporation section 17 of the heat pipe 161 is heated, it will boil or evaporate, absorb the heat of the external heat source, generate latent heat of vaporization, change from liquid to steam, and the generated steam flows to the condensation section 18 under the action of a certain pressure difference in the pipe. The steam meets the cold wall surface and the external cold source, condenses into a liquid, releases the latent heat of vaporization at the same time, and transfers it to the external cold source through the pipe wall. The condensate flows back to the evaporation section 17 under the action of gravity (or wick) and evaporates again. In this way, the heat transfer and exchange of two external cold and hot media are realized, without providing an additional power source, reducing the auxiliary power consumption of the system.

[0058] Specifically, it can be combined with Figure 4 to understand the heat pipe heat exchanger 16 of the embodiment of the present invention. As Figure 4 shown, the heat pipe heat exchanger 16 is composed of an evaporation section 17 and a condensation section 18. The evaporation section 17 is integrated on the liquid-cooled side after heat exchange with the energy storage converter 14. The working fluid inside the heat pipe heat exchanger 16 absorbs heat from the hot water at this place, and the working fluid changes from liquid to gas and runs to the condensation section 18. It can be understood that the temperature of the electrical system 15 is relatively low. The condensation section 18 is in the electrical system 15, and the gaseous working fluid dissipates heat to the electrical system 15 at this place and becomes liquid and flows back to the evaporation section 17. In order to strengthen the heat exchange between the condensation section 18 and the electrical system 15, a fan is arranged near the condensation section 18 of the heat pipe heat exchanger 16 to strengthen heat transfer.

[0059] When the temperature in the electrical room is relatively low, such as when the temperature is lower than -5°C, the lead-acid battery equipped with the uninterruptible power supply device 151 needs to be heated. At this time, the evaporation section of the heat pipe heat exchanger 16 absorbs heat from the converter circulating liquid path, and the heat is transferred to the condensation section 18 through the heat pipe heat exchanger 16 and is forcibly convected and dissipated heat with the electrical system 15 to ensure that the temperature of the electrical system 15 is within the suitable temperature range of the lead-acid battery. That is to say, when the ambient temperature probe in the electrical room monitors that the ambient temperature is less than -5°C, the heat pipe heat exchanger 16 starts to operate, and transfers the heat in the converter circulating liquid path on the side of the energy storage converter 14 to the electrical room to heat the uninterruptible power supply device 151.

[0060] It can be understood that the heating power of the energy storage converter 14 is relatively large. For example, taking an energy storage system with a battery capacity of 5 MWh as an example, the charge and discharge operate at a power of 0.5P, and the heating power of the PCS is 50 KW. Since the heating power of the PCS is relatively large, the temperature of the coolant after heat exchange from the converter thermal management module 22 can reach above 40°C, which can well heat the uninterruptible power supply device 151.

[0061] In the prior art, at low temperatures, such as below -5°C, additional heating equipment is required, which is costly and has a high failure rate. However, in this embodiment of the invention, a heat pipe heat exchanger 16 is added to the converter circulating fluid circuit to transfer the heat in the converter circulating fluid circuit to the electrical room to heat the uninterruptible power supply equipment 151, which eliminates the need for additional heating equipment and reduces costs.

[0062] In some embodiments of this utility model, the battery temperature control module 31 includes a battery heater 311, which is connected to the battery circulating fluid circuit and is used to heat the coolant in the battery circulating fluid circuit.

[0063] Specifically, such as Figure 1 As shown, the battery heater 311 is located on the liquid cooling pipeline between the liquid outlet of the first heat exchanger 322 and the liquid inlet of the third heat exchanger 222. The coolant passes through the first heat exchanger 322, then through the battery heater 311, and then through the third heat exchanger 222.

[0064] In some embodiments of this utility model, the battery module 13 includes a plurality of battery cells 131, each battery cell 131 is arranged in a row, and different battery cells 131 are arranged side by side in the housing 11; the energy storage converter 14 includes a plurality of converter units 141, each row of battery cells 131 corresponds to one converter unit 141, and the converter unit 141 is located at the bottom of the same row of battery cells 131.

[0065] For example, the converter unit 141 can be integrated with the high-voltage box to form an integrated energy storage converter and boost converter, located in the bottom space of the battery unit 131. Figure 5 and Figure 6 As shown, the battery module 13 may include 6 battery cells 131, and the energy storage converter 14 may include 6 converter units 141. Each row of battery cells 131 corresponds to one converter unit 141. In the vertical direction, the battery packs 1311 in each battery cell 131 are arranged in a row, and the converter unit 141 is located at the bottom of the row of battery cells 131, that is, below the battery cells 131. In the horizontal direction, multiple battery cells 131 are arranged side by side in the housing 11.

[0066] In some embodiments of this utility model, each row of battery cells 131 includes a multi-layer battery pack 1311, and the battery circulation fluid passage passes through each battery pack 1311 in sequence.

[0067] Specifically, by Figure 6As shown, each row of battery cells 131 includes multiple battery packs 1311. It is understood that a water tank 45 provides coolant for the battery circulation system. The outlet of the water tank 45 is connected to a main liquid cooling pipeline. The main liquid cooling pipeline has multiple branches that provide coolant to each battery cell 131. Each of these multiple branches has multiple sub-branches that pass through multiple battery packs 1311, so that the battery circulation system passes through each battery pack 1311 sequentially.

[0068] In this configuration, one row of battery cells 131 corresponds to one inverter unit 141. The battery cells 131 and inverter units 141 in the same row form a branch, and different branches are connected in parallel to reduce the circulating current effect between rows. During charging and discharging, the battery cells 131 in each row do not affect each other. If one row fails and stops, the battery cells 131 and inverter units 141 in the other rows can continue to operate normally.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0071] In the description of this utility model, "multiple" means two or more.

[0072] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0073] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0074] Other configurations and operations of the energy storage system 1 according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0076] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage system, characterized in that, include: Box; Temperature control system, the temperature control system being installed inside the enclosure, the temperature control system comprising: The battery thermal management module is equipped with a battery circulating fluid circuit; A converter thermal management module, wherein the converter thermal management module is provided with a converter circulating fluid circuit; A battery module is installed inside the housing, and the battery circulating fluid circuit passes through the battery module for heat exchange with the battery module; An energy storage converter is installed inside the housing and located at the bottom of the battery module. The converter's circulating fluid circuit passes through the energy storage converter to exchange heat with it.

2. The energy storage system according to claim 1, characterized in that, The battery thermal management module includes: A battery temperature control module, wherein the battery circulating fluid circuit is formed in the battery temperature control module; A refrigerant heat dissipation module is connected to the battery temperature control module to absorb heat from the battery circulating fluid circuit.

3. The energy storage system according to claim 2, characterized in that, The refrigerant heat dissipation module is equipped with a refrigerant circulation circuit and includes: The compressor drives the refrigerant to flow in the refrigerant circulation circuit; A first heat exchanger is connected to the side of the refrigerant circulation circuit adjacent to the battery temperature control module to absorb heat from the battery circulation circuit. A second heat exchanger is connected to the side of the refrigerant circulation circuit away from the battery temperature control module to release the heat absorbed by the battery circulation circuit.

4. The energy storage system according to claim 2, characterized in that, The converter circulating fluid circuit includes: A water pump drives coolant to flow in the converter's circulating fluid circuit; A third heat exchanger is connected to the side of the converter circulating fluid circuit adjacent to the battery temperature control module, so that the battery circulating fluid circuit absorbs the heat of the converter circulating fluid circuit. A fourth heat exchanger is connected to the side of the converter circulating fluid circuit away from the battery temperature control module to release the heat of the converter circulating fluid circuit.

5. The energy storage system according to claim 1, characterized in that, Also includes: An electrical system is installed inside the enclosure, and the electrical system is adjacent to the battery module and located on the side of the enclosure; A heat pipe heat exchanger having an evaporation section and a condensation section, wherein the evaporation section of the heat pipe heat exchanger is connected to the converter circulating fluid circuit to absorb heat from the converter circulating fluid circuit, and the condensation section of the heat pipe heat exchanger is connected to the electrical system to heat the electrical system.

6. The energy storage system according to claim 5, characterized in that, The electrical system includes: An uninterruptible power supply (UPS) device, wherein the condenser section of the heat pipe heat exchanger is connected to the UPS device to heat the UPS device.

7. The energy storage system according to claim 5, characterized in that, The heat pipe heat exchanger includes: A heat pipe, wherein one end of the heat pipe forms the evaporation section and the other end forms the condensation section; Multiple fins, each of which surrounds the outer peripheral surface of the heat pipe and is perpendicular to the axis of the heat pipe, and the multiple fins are spaced apart along the length of the heat pipe; A baffle plate surrounds the outer circumferential surface of the heat pipe and is parallel to the fins, the baffle plate separating the condensation section and the evaporation section.

8. The energy storage system according to claim 1, characterized in that, The battery temperature control module includes: A battery heater is connected to the battery circulating fluid circuit and is used to heat the coolant in the battery circulating fluid circuit.

9. The energy storage system according to claim 1, characterized in that, The battery module includes multiple battery cells, each of which is arranged in a row, and different battery cells are arranged side by side in the housing. The energy storage converter includes multiple converter units, with each column of battery cells corresponding to one converter unit, and the converter unit located at the bottom of the same column of battery cells.

10. The energy storage system according to claim 9, characterized in that, Each column of battery cells comprises a multi-layer battery pack, and the battery circulation fluid path passes sequentially through each battery pack.

Images