Energy storage temperature control system
By using multi-way valves and control units in the energy storage temperature control system to select different heat exchangers to form a loop, the problems of high cost of independent heat exchangers and high heat dissipation pressure of shared heat exchangers are solved, achieving flexible temperature control and simplified pipeline control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HOYMILES POWER ELECTRONICS INC
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-14
Smart Images
Figure CN224502068U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of thermal management technology, and in particular to an energy storage temperature control system. Background Technology
[0002] In related technologies, temperature control is required for the battery pack (PACK) and power conversion system (PCS) in the energy storage temperature control system to ensure normal system operation. The battery pack and power conversion system can use independent heat exchangers or share a single heat exchanger. Using an independent heat exchanger leads to higher costs, more complex piping, and greater difficulty in control. Using a shared heat exchanger results in excessive heat dissipation pressure on the heat exchanger, thus affecting heat dissipation efficiency. Summary of the Invention
[0003] This disclosure provides an energy storage temperature control system.
[0004] In a first aspect, this disclosure provides an energy storage temperature control system, comprising: at least one energy storage converter, at least one battery pack, a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a first multi-way valve, a second multi-way valve, and a control unit; the control unit is used to control the first multi-way valve to select either the first heat exchanger or the second heat exchanger, and to form a converter circuit with the at least one energy storage converter, wherein the first heat exchanger and the second heat exchanger correspond to different heat exchange capacities; the control unit is also used to control the first multi-way valve and the second multi-way valve to select at least one of the first heat exchanger, the second heat exchanger, and the third heat exchanger, and to form a battery pack circuit with the at least one battery pack; the compressor, the third heat exchanger, and the fourth heat exchanger form a compression circuit, and the compression circuit and the battery pack circuit are coupled through the third heat exchanger.
[0005] Optionally, the first multi-way valve is a four-way valve, and the second multi-way valve is a three-way valve; the first valve and the second valve of the first multi-way valve are respectively connected to the energy storage converter and the first heat exchanger, and the energy storage converter and the first heat exchanger are connected; the third valve and the fourth valve of the first multi-way valve are respectively connected to the first valve of the second multi-way valve and the second heat exchanger, and the second heat exchanger is connected to the second valve of the second multi-way valve; the first heat exchanger and the second heat exchanger are connected at the end away from the first multi-way valve; the second valve and the third valve of the second multi-way valve are also respectively connected to the third heat exchanger and the battery pack, and the third heat exchanger is connected to the battery pack.
[0006] Optionally, the control unit is configured to control the first multi-way valve to be in a first conducting state to select the energy storage converter and the first heat exchanger to form a first converter sub-loop; the control unit is configured to control the first multi-way valve to be in a second conducting state to select the energy storage converter and the second heat exchanger to form a second converter sub-loop; the control unit is configured to control the second multi-way valve to be in a third conducting state to select the battery pack and the third heat exchanger to form a first battery pack sub-loop; the control unit is configured to control the first multi-way valve to be in the first conducting state and control the second multi-way valve to be in a fourth conducting state to select the battery pack, the second heat exchanger, and the third heat exchanger to form a second battery pack sub-loop; the control unit is configured to control the first multi-way valve to be in the second conducting state. The system is configured to: 1) be in a conducting state and control the second multi-way valve to be in the fourth conducting state, thereby selecting the battery pack, the first heat exchanger, and the third heat exchanger to form a third battery pack sub-circuit; 2) be in a first conducting state, meaning that the first and second valves of the first multi-way valve are connected, and the third and fourth valves are also connected; 3) be in a second conducting state, meaning that the first and fourth valves of the first multi-way valve are connected, and the second and third valves are also connected; 4) be in a fourth conducting state, meaning that the second valve of the second multi-way valve is closed, and the first and third valves are connected.
[0007] Optionally, when the battery pack temperature is lower than a preset battery temperature threshold, the energy storage temperature control system is controlled to enter a heating mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is greater than or equal to a first ambient temperature threshold, the energy storage temperature control system is controlled to enter a high-temperature shock mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than the first ambient temperature threshold and greater than the second ambient temperature threshold, the energy storage temperature control system is controlled to enter a compression cooling mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than the second ambient temperature threshold and greater than the third ambient temperature threshold, the energy storage temperature control system is controlled to enter a wind-cooling mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than or equal to the third ambient temperature threshold, the energy storage temperature control system is controlled to enter a waste heat utilization mode; wherein, the first ambient temperature threshold is greater than the second ambient temperature threshold, and the second ambient temperature threshold is greater than the third ambient temperature threshold.
[0008] Optionally, the energy storage temperature control system further includes a heating unit connected in series between the third heat exchanger and the second valve of the second multi-way valve; in the heating mode, the second multi-way valve is in the third open state, the heat exchange medium flows in the first battery pack sub-circuit, and the heating unit heats the heat exchange medium in the first battery pack sub-circuit.
[0009] Optionally, in the high-temperature shock mode, the first multi-way valve is in a first conducting state, and the second multi-way valve is in a fourth conducting state; the heat exchange medium flows in the first converter sub-loop, and the first heat exchanger dissipates heat from the heat exchange medium in the first converter sub-loop; the compression loop executes a Carnot cycle through the compressor, the third heat exchanger, and the fourth heat exchanger; the heat exchange medium flows in the second battery pack sub-loop, and the second heat exchanger and the third heat exchanger dissipate heat from the heat exchange medium in the second battery pack sub-loop.
[0010] Optionally, in the compression refrigeration mode, the first multi-way valve is in a second open state, and the second multi-way valve is in a third open state; the heat exchange medium flows in the first converter sub-loop, and the first heat exchanger dissipates heat from the heat exchange medium in the first converter sub-loop; the compression loop executes a Carnot cycle through the compressor, the third heat exchanger, and the fourth heat exchanger; the heat exchange medium flows in the first battery pack sub-loop, and the third heat exchanger dissipates heat from the heat exchange medium in the first battery pack sub-loop.
[0011] Optionally, in the air-cooled mode, the first multi-way valve is in a second open state, and the second multi-way valve is in a fourth open state; the heat exchange medium flows in the second converter sub-circuit, and the second heat exchanger dissipates heat from the heat exchange medium in the second converter sub-circuit; the heat exchange medium flows in the third battery pack sub-circuit, and the first heat exchanger dissipates heat from the heat exchange medium in the third battery pack sub-circuit; the compression circuit is in an idle state.
[0012] Optionally, in the waste heat utilization mode, the first multi-way valve is in a first open state, and the second multi-way valve is in a fourth open state; the heat exchange medium flows in the first converter sub-loop, and the first heat exchanger dissipates heat from the heat exchange medium in the first converter sub-loop; the heat exchange medium flows in the second battery pack sub-loop, and the heat exchange medium flowing out from the second heat exchanger mixes with the heat exchange medium flowing out from the first heat exchanger in the pipeline to increase the temperature of the heat exchange medium returning to the second battery pack sub-loop; the compression circuit is in an idle state.
[0013] Optionally, the flow rate of the heat exchange medium in the second battery pack sub-circuit is greater than the flow rate of the heat exchange medium in the first inverter sub-circuit; wherein, the heat exchange medium in the second battery pack sub-circuit is split at the outlet of the second heat exchanger, so that a portion of the heat exchange medium in the second battery pack sub-circuit flows into the first inverter sub-circuit and mixes with the heat exchange medium in the first inverter sub-circuit, and another portion of the heat exchange medium in the second battery pack sub-circuit mixes with the heat exchange medium flowing out from the outlet of the first heat exchanger and then flows into the second battery pack sub-circuit.
[0014] The energy storage temperature control system provided in this embodiment includes: at least one energy storage converter, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, at least one battery pack, a first multi-way valve, a second multi-way valve, a compressor, and a control unit. The control unit is used to control the first multi-way valve to select either the first heat exchanger or the second heat exchanger, and to form a converter circuit with the at least one energy storage converter. The first heat exchanger and the second heat exchanger have different heat exchange capacities. The control unit is also used to control the first multi-way valve and the second multi-way valve to select at least one of the first heat exchanger, the second heat exchanger, and the third heat exchanger, and to form a battery pack circuit with the at least one battery pack. The compressor, the third heat exchanger, and the fourth heat exchanger form a compression circuit, and the compression circuit and the battery pack circuit are coupled through the third heat exchanger. Therefore, in this embodiment of the present disclosure, by controlling the first multi-way valve through the control unit, the converter circuit can select heat exchangers with different heat exchange capacities for temperature control. In addition, by controlling the first multi-way valve and the second multi-way valve through the control unit, the battery pack circuit can select heat exchangers with different numbers and different heat exchange capacities for temperature control. In this way, heat exchangers that match different heat exchange requirements can be selected, which can ensure a good temperature control effect and is applicable to a variety of complex working conditions.
[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0016] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the embodiments of the present disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:
[0017] Figure 1 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure.
[0018] Figure 2This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure.
[0019] Figure 3 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure.
[0020] Figure 4 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure.
[0021] Figure 5 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure.
[0022] Figure 6 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure.
[0023] Figure 7 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure. Detailed Implementation
[0024] To enable those skilled in the art to better understand the technical solutions of this disclosure, exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments of this disclosure to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.
[0025] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.
[0026] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.
[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded. Words such as “connected” or “linked” are not limited to physical or mechanical connections but can include electrical connections, whether direct or indirect.
[0028] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.
[0029] In related technologies, battery packs and energy storage converters use separate heat exchangers for heat exchange, or they share a common heat exchanger. The latter approach, using separate heat exchangers, is costly, requires a large footprint, and typically necessitates complex piping connections using multi-way valves, resulting in complex control methods. In the shared heat exchanger approach, the battery pack and energy storage converter dissipate heat through a single heat exchanger, which can lead to excessive heat exchange pressure on that heat exchanger, potentially failing to meet heat exchange requirements.
[0030] In view of this, the present disclosure provides an energy storage temperature control system.
[0031] The energy storage temperature control system provided in this embodiment includes at least one energy storage converter, at least one battery pack, a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a first multi-way valve, a second multi-way valve, and a control unit. The control unit is used to control the first multi-way valve to select either the first or second heat exchanger and to form a converter circuit with the at least one energy storage converter. The first and second heat exchangers correspond to different heat exchange capacities. The control unit is also used to control the first and second multi-way valves to select at least one of the first, second, and third heat exchangers and to form a battery pack circuit with the at least one battery pack. The compressor, the third heat exchanger, and the fourth heat exchanger form a compression circuit, and the compression circuit and the battery pack circuit are coupled through the third heat exchanger. Therefore, in this embodiment of the present disclosure, by controlling the first multi-way valve through the control unit, the converter circuit can select heat exchangers with different heat exchange capacities for temperature control. In addition, by controlling the first multi-way valve and the second multi-way valve through the control unit, the battery pack circuit can select heat exchangers with different numbers and different heat exchange capacities for temperature control. In this way, heat exchangers that match different heat exchange requirements can be selected, which can ensure a good temperature control effect and is applicable to a variety of complex working conditions.
[0032] The first aspect of this disclosure provides an energy storage temperature control system.
[0033] Figure 1 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure. (Refer to...) Figure 1The energy storage temperature control system includes: at least one energy storage converter 110, a first heat exchanger 210, a second heat exchanger 220, a third heat exchanger 230, a fourth heat exchanger 240, at least one battery pack 310, a first multi-way valve 410, a second multi-way valve 420, a compressor 510, and a control unit.
[0034] The control unit is used to control the first multi-way valve 410 to select the first heat exchanger 210 or the second heat exchanger 220, and to form a converter circuit with at least one energy storage converter 110. The first heat exchanger 210 and the second heat exchanger 220 correspond to different heat exchange capacities.
[0035] The control unit is also used to control the first multi-way valve 410 and the second multi-way valve 420 to select at least one of the first heat exchanger 210, the second heat exchanger 220 and the third heat exchanger 230, and to form a battery pack circuit with at least one battery pack 310.
[0036] The compressor 510, the third heat exchanger 230 and the fourth heat exchanger 240 form a compression circuit, and the compression circuit is coupled to the battery pack circuit through the third heat exchanger 230.
[0037] A heat exchanger is a device that allows two fluids at different temperatures to exchange heat. In some optional embodiments, the first heat exchanger 210 and the second heat exchanger 220 can be water-air heat exchangers, the third heat exchanger 230 can be an evaporator, and the fourth heat exchanger 240 can be a water-water heat exchanger (such as a condenser). The above descriptions of the types of heat exchangers are merely illustrative and are not intended to limit the scope of this disclosure.
[0038] In some optional embodiments, the heat exchange capacity of the first heat exchanger 210 is greater than that of the second heat exchanger 220. Therefore, during the temperature control process, a heat exchanger that matches the temperature control requirements can be selected to dissipate heat from the corresponding circuit, which improves the flexibility of temperature control and makes it applicable to a wider range of temperature control scenarios.
[0039] For example, for the energy storage converter 110, if a large heat dissipation requirement is needed, a first heat exchanger 210 with a relatively large heat exchange capacity can be selected as the heat exchanger for cooling the converter circuit. If the heat dissipation requirement is small, a second heat exchanger 220 with a relatively small heat exchange capacity can be selected as the heat exchanger for cooling the converter circuit. The battery pack circuit is similar; when the heat dissipation requirement is large, heat exchangers with larger heat exchange capacities and / or a larger number can be selected for heat dissipation, and when the heat dissipation requirement is small, heat exchangers with smaller heat exchange capacities and / or a smaller number can be selected for heat dissipation.
[0040] In some optional embodiments, the control unit is used to control the first multi-way valve 410 to be in a first open state, so as to select the energy storage converter 110 and the first heat exchanger 210 to form a first converter sub-loop; the control unit is used to control the first multi-way valve 410 to be in a second open state, so as to select the energy storage converter 110 and the second heat exchanger 220 to form a second converter sub-loop; the control unit is used to control the second multi-way valve 420 to be in a third open state, so as to select the battery pack 310 and the third heat exchanger 230 to form a first electric... The control unit controls the first multi-way valve 410 to be in the first conducting state and the second multi-way valve 420 to be in the fourth conducting state, so as to select the battery pack 310, the second heat exchanger 220 and the third heat exchanger 230 to form the second battery pack sub-circuit; the control unit controls the first multi-way valve 410 to be in the second conducting state and the second multi-way valve 420 to be in the fourth conducting state, so as to select the battery pack 310, the first heat exchanger 210 and the third heat exchanger 230 to form the third battery pack sub-circuit.
[0041] In some alternative embodiments, the first multi-way valve 210 is a four-way valve, and the second multi-way valve 220 is a three-way valve; correspondingly, such as Figure 1 As shown, the first valve 411 and the second valve 412 of the first multi-way valve 410 are respectively connected to the energy storage converter 110 and the first heat exchanger 210, and the energy storage converter 110 and the first heat exchanger 210 are connected. The third valve 413 and the fourth valve 414 of the first multi-way valve 410 are respectively connected to the first valve 421 of the second multi-way valve 420 and the second heat exchanger 220, and the second heat exchanger 220 is connected to the second valve 422 of the second multi-way valve 420. The first heat exchanger 210 and the second heat exchanger 220 are connected at the end away from the first multi-way valve 410. The second valve 422 and the third valve 423 of the second multi-way valve 420 are also respectively connected to the third heat exchanger 230 and the battery pack 310, and the third heat exchanger 230 is connected to the battery pack 310.
[0042] It should be noted that the energy storage temperature control system may also include functional units such as a water tank, a water pump, and an expansion valve, and this embodiment does not limit this. In addition, the control unit can be understood as an abstract functional unit, which can adjust the connection relationship of the heat exchangers by controlling the first multi-way valve 410 and the second multi-way valve 420, thereby selecting the first heat exchanger 210 or the second heat exchanger 220 to form a converter circuit with the energy storage converter 110. Alternatively, at least one of the first heat exchanger 210, the second heat exchanger 220, and the third heat exchanger 230 can be selected to form a battery pack circuit with the battery pack 310.
[0043] In summary, in this embodiment of the present disclosure, the energy storage temperature control system includes at least one energy storage converter, at least one battery pack, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a first multi-way valve, a second multi-way valve, a compressor, and a control unit. The control unit is used to control the first multi-way valve to select either the first or second heat exchanger and to form a converter circuit with at least one energy storage converter. The first and second heat exchangers correspond to different heat exchange capacities. The control unit is also used to control the first and second multi-way valves to select at least one of the first, second, and third heat exchangers and to form a battery pack circuit with at least one battery pack. The compressor, the third heat exchanger, and the fourth heat exchanger form a compression circuit, and the compression circuit and the battery pack circuit are coupled through the third heat exchanger. Therefore, in this embodiment of the present disclosure, by controlling the first multi-way valve through the control unit, the converter circuit can select heat exchangers with different heat exchange capacities for temperature control. In addition, by controlling the first multi-way valve and the second multi-way valve through the control unit, the battery pack circuit can select heat exchangers with different numbers and different heat exchange capacities for temperature control. In this way, heat exchangers that match different heat exchange requirements can be selected, which can ensure a good temperature control effect and is applicable to a variety of complex working conditions.
[0044] The following is combined with Figures 2 to 7 The energy storage temperature control system of this disclosure will be described in detail.
[0045] Figure 2 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure. (Refer to...) Figure 2 The energy storage temperature control system includes: an energy storage converter 110, a first heat exchanger 210, a second heat exchanger 220, a third heat exchanger 230, a fourth heat exchanger 240, a battery pack 310, a first multi-way valve 410, a second multi-way valve 420, a compressor 510, a heating unit 610, a water tank 710, a first water pump 810, a second water pump 820, and an expansion valve 910.
[0046] The first multi-way valve 410 is a four-way valve, and the second multi-way valve 420 is a three-way valve. When the control unit controls the first multi-way valve 410 to be in the first conducting state, the first valve 411 and the second valve 412 of the first multi-way valve 410 are connected, and the third valve 413 and the fourth valve 414 are also connected. At this time, the first water pump 810, the energy storage converter 110, and the first heat exchanger 210 form the first converter sub-loop. When the control unit controls the first multi-way valve 410 to be in the second conducting state, the first valve 411 and the fourth valve 414 of the first multi-way valve 410 are connected, and the second valve 412 and the third valve 413 are also connected. At this time, the first water pump 810, the energy storage converter 110, the second heat exchanger 220, and the heating unit 610 form the second converter sub-loop.
[0047] Furthermore, when the control unit controls the second multi-way valve 420 to be in the third conducting state, the first valve 421 of the second multi-way valve 420 is in the closed state, and the second valve 422 and the third valve 423 are connected. At this time, the battery pack 310, the third heat exchanger 230, the second water pump 820 and the heating unit 610 form the first battery pack sub-circuit.
[0048] When the control unit controls the first multi-way valve 410 to be in the first conducting state and controls the second multi-way valve 420 to be in the fourth conducting state, the second valve 422 of the second multi-way valve 420 is in the closed state, and the first valve 421 and the third valve 423 of the second multi-way valve 420 are connected. At this time, the battery pack 310, the second heat exchanger 220, the third heat exchanger 230, the second water pump 820 and the heating unit 610 form the second battery pack sub-circuit.
[0049] When the control unit controls the first multi-way valve 410 to be in the second open state and controls the second multi-way valve 420 to be in the fourth open state, the battery pack 310, the first heat exchanger 210, the third heat exchanger 230, the second water pump 820 and the heating unit 610 form the third battery pack sub-circuit.
[0050] In some optional embodiments, when the battery pack temperature is lower than a preset battery temperature threshold, the energy storage temperature control system is controlled to enter a heating mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is greater than or equal to a first ambient temperature threshold, the energy storage temperature control system is controlled to enter a high-temperature shock mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than the first ambient temperature threshold but greater than the second ambient temperature threshold, the energy storage temperature control system is controlled to enter a compression cooling mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than the second ambient temperature threshold but greater than the third ambient temperature threshold, the energy storage temperature control system is controlled to enter a wind-cooling mode; when the battery pack temperature is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than or equal to the third ambient temperature threshold, the energy storage temperature control system is controlled to enter a waste heat utilization mode; wherein, the first ambient temperature threshold is greater than the second ambient temperature threshold, and the second ambient temperature threshold is greater than the third ambient temperature threshold.
[0051] Therefore, it can be seen that the energy storage temperature control system can be controlled to enter different temperature control modes according to the ambient temperature and battery temperature, thereby ensuring the safe and stable operation of the system.
[0052] It should be noted that, Figure 1 and Figure 2This is merely an illustrative representation of the connection relationships between various functional units in an energy storage temperature control system. The positional relationships of the various functional units (such as heat exchangers) are merely illustrative and are not intended to limit the scope of this disclosure.
[0053] For example, multiple heat exchangers can be placed in close proximity, and the fan of one of the heat exchangers can be used to dissipate heat from all of them in a unified manner, which can effectively save the number of fans and improve heat dissipation efficiency.
[0054] Figure 3 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of the present disclosure, used to characterize the temperature control process of the energy storage temperature control system in heating mode. (Refer to...) Figure 3 When the temperature of battery pack 310 is lower than a preset battery temperature threshold (e.g., 5 degrees Celsius), the energy storage temperature control system enters heating mode, the second multi-way valve 420 is in the third conducting state, and the heat exchange medium is in the first battery pack sub-circuit (e.g., Figure 3 The heat exchange medium in the first battery pack sub-circuit (shown by the thickened lines and line-filled arrows) flows through the circuit and is heated by the heating unit 610, thereby indicating the temperature of the battery pack 310 and preventing the battery pack 310 from malfunctioning due to excessively low temperature.
[0055] Figure 4 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure, used to characterize the temperature control process of the energy storage temperature control system under high-temperature shock mode. (Refer to...) Figure 4 When the temperature of the battery pack 310 is greater than or equal to a preset battery temperature threshold, and the ambient temperature is greater than or equal to a first ambient temperature threshold (e.g., 35 degrees Celsius), the energy storage temperature control system enters a high-temperature shock mode. In this high-temperature shock mode, the first multi-way valve 410 is in a first conducting state, the second multi-way valve 420 is in a fourth conducting state, and the heat exchange medium is in the first converter sub-circuit (e.g., ...). Figure 4 The medium flows through the circuit indicated by the bold lines and dotted arrows, and the first heat exchanger 210 dissipates heat from the heat exchange medium in the first converter sub-circuit; simultaneously, the compression circuit (such as...) Figure 4 The circuit indicated by the bold lines and black-filled arrows executes a Carnot cycle through compressor 510, third heat exchanger 230, and fourth heat exchanger 240; the heat exchange medium is in the second battery pack sub-circuit (e.g., Figure 4 The circuit (shown by the thickened lines and line-filled arrows) flows through the second battery pack sub-circuit, and the second heat exchanger 220 and the third heat exchanger 230 dissipate heat from the heat exchange medium in the second battery pack sub-circuit.
[0056] Therefore, under the high-temperature shock mode, considering the high ambient temperature, to achieve efficient heat dissipation of the battery pack 310, the heat exchange medium in the second battery pack sub-circuit can be cooled through the second heat exchanger 220 and the third heat exchanger 230 in the compression circuit. Both heat exchangers share the heat dissipation pressure of the second battery pack sub-circuit, thus rapidly and efficiently reducing the temperature of the battery pack 310. For the energy storage converter 110, its heat exchange requirements can be met by the first heat exchanger 210.
[0057] Figure 5 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of the present disclosure, used to characterize the temperature control process of the energy storage temperature control system in compression refrigeration mode. (Refer to...) Figure 5 When the temperature of the battery pack 310 is greater than or equal to a preset battery temperature threshold, and the ambient temperature is less than a first ambient temperature threshold but greater than a second ambient temperature threshold, the energy storage temperature control system enters a compression cooling mode. Compared to the high-temperature shock mode, this mode alleviates the heat dissipation requirements of the battery pack 310 (or the battery pack circuit) to a certain extent. In the compression cooling mode, the first multi-way valve 410 is in the second conducting state, the second multi-way valve 420 is in the third conducting state, and the heat exchange medium is in the first converter sub-circuit (e.g., Figure 5 The circuit (shown by the bold lines and dotted arrows) flows, and the first heat exchanger 210 dissipates heat from the heat exchange medium in the first converter sub-circuit; simultaneously, the compression circuit (such as...) Figure 5 The circuit indicated by the bold line and black filled arrows executes a Carnot cycle through compressor 510, third heat exchanger 230 (e.g., evaporator), and fourth heat exchanger 240 (e.g., condenser); the heat exchange medium is in the first battery pack sub-circuit (e.g., Figure 5 The circuit (shown by the thickened lines and line-filled arrows) flows through the first battery pack sub-circuit, and the third heat exchanger 230 dissipates heat from the heat exchange medium in the first battery pack sub-circuit.
[0058] Therefore, in the compression cooling mode, to dissipate heat from the battery pack 310, the heat exchange medium in the first battery pack sub-loop can be cooled using the third heat exchanger 230 in the compression loop, thereby meeting the heat dissipation requirements of the first battery pack sub-loop and rapidly reducing the temperature of the battery pack 310. For the energy storage converter 110, its heat exchange requirements can be met by using the first heat exchanger 210.
[0059] Furthermore, comparison Figure 5 and Figure 6It can be seen that when the ambient temperature drops, there is no need to connect the second heat exchanger 220 in series to the battery pack circuit to participate in the heat exchange process. The heat exchange requirements of the battery pack can be met simply by exchanging heat with the compression circuit, so that the energy storage temperature control system can meet diverse heat dissipation requirements.
[0060] Figure 6 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure, used to characterize the temperature control process of the energy storage temperature control system in air-cooled mode. (Refer to...) Figure 6 When the temperature of the battery pack 310 is greater than or equal to a preset battery temperature threshold, and the ambient temperature is less than a second ambient temperature threshold (e.g., 15 degrees Celsius) or greater than a third ambient temperature threshold (e.g., 5 degrees Celsius), the energy storage temperature control system enters air-cooling mode. In air-cooling mode, the first multi-way valve 410 is in the second conducting state, and the second multi-way valve 420 is in the fourth conducting state. The heat exchange medium is in the second converter sub-circuit (e.g., ...). Figure 6 The heat exchange medium flows through the circuit indicated by the bold lines and dotted arrows, and the second heat exchanger 220 dissipates heat from the heat exchange medium in the second converter sub-circuit; simultaneously, the heat exchange medium flows through the third battery pack sub-circuit (such as...). Figure 6 The circuit (shown by the thickened lines and line-filled arrows) flows and dissipates heat from the heat exchange medium in the third battery pack sub-circuit based on the first heat exchanger 210; the compression circuit is in an idle state.
[0061] Therefore, when the ambient temperature is relatively low, the battery pack 310 can meet its heat exchange requirements through the first heat exchanger 210 with a higher heat exchange capacity, while the energy storage converter 110 can meet its heat exchange requirements through the second heat exchanger 220 with a lower heat exchange capacity.
[0062] Figure 7 This is a schematic diagram of an energy storage temperature control system provided in an embodiment of this disclosure, used to characterize the temperature control process of the energy storage temperature control system in waste heat utilization mode. (Refer to...) Figure 7 When the temperature of the battery pack 310 is greater than or equal to a preset battery temperature threshold, and the ambient temperature is less than or equal to a third ambient temperature threshold, the energy storage temperature control system enters waste heat utilization mode. In waste heat utilization mode, the first multi-way valve 410 is in the first conducting state, the second multi-way valve 420 is in the fourth conducting state, and the heat exchange medium is in the first converter sub-loop (e.g., Figure 7 The heat exchange medium flows through the circuit indicated by the bold lines and dotted arrows, and the first heat exchanger 210 dissipates heat from the heat exchange medium in the first converter sub-circuit; simultaneously, the heat exchange medium flows through the second battery pack sub-circuit (such as...). Figure 7The circuit (shown by the bold lines and line-filled arrows) flows, and the heat exchange medium flowing out from the second heat exchanger 220 mixes with the heat exchange medium flowing out from the first heat exchanger in the pipeline to increase the temperature of the heat exchange medium returning to the second battery pack sub-circuit; the compression circuit is in an idle state.
[0063] In other words, in the waste heat utilization mode, the battery pack circuit exchanges heat through the second heat exchanger 220, which has a lower heat exchange capacity, while the converter circuit exchanges heat through the first heat exchanger 210, which has a higher heat exchange capacity. Furthermore, the flow is mixed at the pipe between the outlets of the first heat exchanger 210 and the second heat exchanger 220. For example, the battery pack circuit with a larger flow rate is split at the outlet of the second heat exchanger 220, with part flowing to the converter circuit and part mixing with the converter return water at the outlet of the first heat exchanger 210, which has a higher temperature. This increases the overall temperature of the battery pack circuit, achieving the purpose of utilizing the waste heat from the converter water temperature.
[0064] In addition, in some optional embodiments, if the first heat exchanger 210 and the second heat exchanger 220 are water-air heat exchangers, the heat dissipation capacity of the water-air heat exchanger can be controlled by adjusting its operating parameters such as fan speed, so that when the energy storage converter 110 is fully charged and discharged, the inside of the cabinet is still at a high temperature, delaying the natural cooling time of the cabinet, so that the battery pack circuit can utilize this waste heat.
[0065] It is understood that the various embodiments mentioned above in this application can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this application will not elaborate further.
[0066] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for general illustrative purposes only and should not be construed as limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this application as set forth by the appended claims.
Claims
1. An energy storage temperature control system, characterized in that, include: At least one energy storage converter, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, at least one battery pack, a first multi-way valve, a second multi-way valve, a compressor, and a control unit; The control unit is used to control the first multi-way valve to select the first heat exchanger or the second heat exchanger, and to form a converter circuit with at least one of the energy storage converters, wherein the first heat exchanger and the second heat exchanger correspond to different heat exchange capacities. The control unit is also used to control the first multi-way valve and the second multi-way valve to select at least one of the first heat exchanger, the second heat exchanger and the third heat exchanger, and to form a battery pack circuit with at least one of the battery packs; The compressor, the third heat exchanger, and the fourth heat exchanger form a compression circuit, and the compression circuit is coupled to the battery pack circuit through the third heat exchanger.
2. The system according to claim 1, characterized in that, The first multi-way valve is a four-way valve, and the second multi-way valve is a three-way valve; The first valve and the second valve of the first multi-way valve are respectively connected to the energy storage converter and the first heat exchanger, and the energy storage converter and the first heat exchanger are connected. The third valve and the fourth valve of the first multi-way valve are respectively connected to the first valve of the second multi-way valve and the second heat exchanger, and the second heat exchanger is connected to the second valve of the second multi-way valve. The first heat exchanger and the second heat exchanger are connected at the end away from the first multi-way valve. The second valve and the third valve of the second multi-way valve are also connected to the third heat exchanger and the battery pack, respectively, and the third heat exchanger is connected to the battery pack.
3. The system according to claim 2, characterized in that, The control unit is used to control the first multi-way valve to be in the first conducting state, so as to select the energy storage converter and the first heat exchanger to form a first converter sub-loop; The control unit is used to control the first multi-way valve to be in the second conducting state, so as to select the energy storage converter and the second heat exchanger to form a second converter sub-loop; The control unit is used to control the second multi-way valve to be in the third conducting state, so as to select the battery pack and the third heat exchanger to form the first battery pack sub-circuit; The control unit is used to control the first multi-way valve to be in the first open state and control the second multi-way valve to be in the fourth open state, so as to select the battery pack, the second heat exchanger, and the third heat exchanger to form a second battery pack sub-circuit. The control unit is used to control the first multi-way valve to be in the second open state and control the second multi-way valve to be in the fourth open state, so as to select the battery pack, the first heat exchanger and the third heat exchanger to form a third battery pack sub-loop; The first multi-way valve being in the first conducting state means that the first valve and the second valve of the first multi-way valve are connected, and the third valve and the fourth valve are also connected; The first multi-way valve being in the second conducting state means that the first valve and the fourth valve of the first multi-way valve are connected, and the second valve and the third valve are also connected; The second multi-way valve being in the third conducting state means that the first valve of the second multi-way valve is in the closed state, and the second valve and the third valve are connected. The second multi-way valve being in the fourth conducting state means that the second valve of the second multi-way valve is in the closed state, and the first valve and the third valve are connected.
4. The system according to any one of claims 1-3, characterized in that, When the temperature of the battery pack is lower than a preset battery temperature threshold, the energy storage temperature control system is controlled to enter the heating mode. When the temperature of the battery pack is greater than or equal to the preset battery temperature threshold and the ambient temperature is greater than or equal to the first ambient temperature threshold, the energy storage temperature control system is controlled to enter the high temperature shock mode. When the temperature of the battery pack is greater than or equal to the preset battery temperature threshold, and the ambient temperature is less than the first ambient temperature threshold and greater than the second ambient temperature threshold, the energy storage temperature control system is controlled to enter the compression cooling mode. When the temperature of the battery pack is greater than or equal to the preset battery temperature threshold, and the ambient temperature is less than the second ambient temperature threshold and greater than the third ambient temperature threshold, the energy storage temperature control system is controlled to enter the air-cooling mode. When the temperature of the battery pack is greater than or equal to the preset battery temperature threshold and the ambient temperature is less than or equal to the third ambient temperature threshold, the energy storage temperature control system is controlled to enter the waste heat utilization mode. Wherein, the first ambient temperature threshold is greater than the second ambient temperature threshold, and the second ambient temperature threshold is greater than the third ambient temperature threshold.
5. The system according to claim 4, characterized in that, The energy storage temperature control system also includes a heating unit, which is connected in series between the third heat exchanger and the second valve of the second multi-way valve; In the heating mode, the second multi-way valve is in the third open state, the heat exchange medium flows in the first battery pack sub-circuit, and the heating unit heats the heat exchange medium in the first battery pack sub-circuit.
6. The system according to claim 4, characterized in that, In the high-temperature shock mode, the first multi-way valve is in the first conducting state, and the second multi-way valve is in the fourth conducting state. The heat exchange medium flows in the first converter sub-loop, and the first heat exchanger dissipates heat from the heat exchange medium in the first converter sub-loop. The compression circuit executes a Carnot cycle through the compressor, the third heat exchanger, and the fourth heat exchanger; The heat exchange medium flows in the second battery pack sub-circuit, and the second heat exchanger and the third heat exchanger dissipate heat from the heat exchange medium in the second battery pack sub-circuit.
7. The system according to claim 4, characterized in that, In the compression refrigeration mode, the first multi-way valve is in the second open state, and the second multi-way valve is in the third open state. The heat exchange medium flows in the first converter sub-loop, and the first heat exchanger dissipates heat from the heat exchange medium in the first converter sub-loop. The compression circuit executes a Carnot cycle through the compressor, the third heat exchanger, and the fourth heat exchanger; The heat exchange medium flows in the first battery pack sub-circuit, and the third heat exchanger dissipates heat from the heat exchange medium in the first battery pack sub-circuit.
8. The system according to claim 4, characterized in that, In the air-cooled mode, the first multi-way valve is in the second open state, and the second multi-way valve is in the fourth open state. The heat exchange medium flows in the second converter sub-loop, and the second heat exchanger dissipates heat from the heat exchange medium in the second converter sub-loop. The heat exchange medium flows in the third battery pack sub-loop and is cooled by the first heat exchanger. The compression circuit is in an idle state.
9. The system according to claim 4, characterized in that, In the waste heat utilization mode, the first multi-way valve is in the first conducting state, and the second multi-way valve is in the fourth conducting state. The heat exchange medium flows in the first converter sub-loop, and the first heat exchanger dissipates heat from the heat exchange medium in the first converter sub-loop. The heat exchange medium flows in the second battery pack sub-loop, and the heat exchange medium flowing out of the second heat exchanger mixes with the heat exchange medium flowing out of the first heat exchanger in the pipeline to increase the temperature of the heat exchange medium flowing back to the second battery pack sub-loop. The compression circuit is in an idle state.
10. The system according to claim 9, characterized in that, The flow rate of the heat exchange medium in the second battery pack sub-circuit is greater than the flow rate of the heat exchange medium in the first converter sub-circuit; In this process, the heat exchange medium in the second battery pack sub-circuit is diverted at the outlet of the second heat exchanger, so that a portion of the heat exchange medium in the second battery pack sub-circuit flows into the first converter sub-circuit and mixes with the heat exchange medium in the first converter sub-circuit. Another portion of the heat exchange medium in the second battery pack sub-circuit mixes with the heat exchange medium flowing out from the outlet of the first heat exchanger and then flows into the second battery pack sub-circuit.