Energy storage temperature control system
By designing a refrigerant mixing and heat exchange method in the energy storage temperature control system, the problem of PCS condensation caused by excessively low coolant temperature was solved, achieving stable operation of PCS and improved energy efficiency.
Patent Information
- Application Number
- CN202520281516.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In existing energy storage liquid cooling systems, when the coolant temperature is low and is directly used to cool the PCS, the PCS temperature falls below the suitable range, which easily leads to condensation and poses a safety risk.
Design an energy storage temperature control system that uses a refrigerant mixing and circulation pump driven by a first heat transfer device and a second heat transfer device to achieve heat exchange of the refrigerant along different paths, thereby increasing the refrigerant temperature and decreasing the refrigerant temperature and preventing condensation.
This effectively avoids condensation on the PCS, improves the energy efficiency of the temperature control system, and ensures that the PCS operates within a suitable temperature range.
Smart Images
Figure CN223680207U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of energy storage temperature control systems. BACKGROUND
[0002] The existing energy storage liquid cooling system is usually cooled by PCS (energy storage converter) and battery pack in series for the consideration of cost and space saving. In the refrigeration process, the coolant is first cooled to the battery pack and then to the PCS. However, the temperature of the coolant after cooling the battery pack is still low, and directly using it to cool the PCS will cause the temperature of the PCS to be lower than the appropriate working temperature range. At the same time, due to the low temperature of the coolant, there is a large temperature difference between the liquid cooling pipe and the PCS, which is easy to form condensate water at the liquid cooling pipe, i.e. condensation phenomenon. Once the condensate water flows into the PCS, it may cause the PCS to fail, which poses a great safety risk. SUMMARY
[0003] The utility model aims at providing a new energy storage temperature control system.
[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of an energy storage temperature control system. The energy storage device is provided with a first heat transfer device for heat exchange with the battery and a second heat transfer device for heat exchange with the energy storage converter. The energy storage temperature control system comprises a compressor, a condenser, a first heat exchanger and a second heat exchanger. The outlet of the compressor, the first heat exchanger, the condenser, the second heat exchanger and the inlet of the compressor are connected in sequence by pipelines and form a refrigerant circulation passage for circulating the refrigerant.
[0005] The outlet of the first heat transfer device, the second heat exchanger and the liquid supply port of the first heat transfer device are connected in sequence by pipelines and together with the first heat transfer device form a first circulation loop for circulating the coolant. A circulating pump is arranged on the pipeline between the outlet of the first heat transfer device and the second heat exchanger. The liquid outlet of the second heat transfer device, the circulating pump, the first heat exchanger and the liquid supply port of the second heat transfer device are connected in sequence by pipelines and together with the second heat transfer device form a second circulation loop for circulating the coolant.
[0006] The energy storage temperature control system has a cooling mode. In the cooling mode, the compressor is turned on, the circulating pump is turned on, the refrigerant circulates in the refrigerant circulation passage, and the coolant circulates in the first and second circulation loops.
[0007] In some embodiments, an electronic valve for controlling the flow is arranged on the pipeline between the circulating pump and the first heat exchanger.
[0008] In some embodiments, a heater is provided in the pipeline between the second heat exchanger and the liquid outlet of the first heat transfer device, and the heater is closed in the cooling mode; the energy storage temperature control system has a heating mode, in which the compressor is closed and the heater is opened.
[0009] In some embodiments, the first heat exchanger has a first heat exchange channel and a second heat exchange channel capable of heat exchange, the second heat exchanger has a third heat exchange channel and a fourth heat exchange channel capable of heat exchange, the first heat exchange channel and the third heat exchange channel are located in the refrigerant circulation passage, the fourth heat exchange channel is located in the first circulation loop, and the second heat exchange channel is located in the second circulation loop.
[0010] In some embodiments, a first filter is provided in the pipeline between the liquid outlet of the first heat transfer device and the circulating pump, and the liquid outlet of the second heat transfer device is connected to the pipeline between the first heat transfer device and the first filter through a pipeline.
[0011] In some embodiments, an electronic expansion valve is provided in the pipeline between the condenser and the second heat exchanger, and a second filter is provided in the pipeline between the condenser and the electronic expansion valve.
[0012] In some embodiments, the energy storage temperature control system comprises an expansion tank, which is connected to the inlet of the circulating pump through a pipeline.
[0013] In some embodiments, the energy storage temperature control system further comprises a liquid supplementing device, which is connected to the pipeline between the expansion tank and the circulating pump through a liquid supplementing pipeline, and a liquid supplementing valve is provided in the liquid supplementing pipeline.
[0014] In some embodiments, the energy storage temperature control system comprises a controller, a first temperature sensor is provided at the inlet of the compressor, a second temperature sensor is provided at the outlet of the compressor, and the first temperature sensor and the second temperature sensor are respectively connected to the controller; an electronic expansion valve is provided in the pipeline between the condenser and the second heat exchanger, and the electronic expansion valve is connected to the controller; the controller is configured to control the opening and closing degree of the electronic expansion valve according to temperature data; the compressor is connected to the controller, and the controller is configured to control the rotating speed of the compressor according to temperature data.
[0015] In some embodiments, the energy storage temperature control system comprises a controller, a third temperature sensor and a first pressure sensor are arranged at the inlet of the circulating pump, a fourth temperature sensor is arranged at the liquid supply port of the first heat transfer device, the third temperature sensor, the first pressure sensor and the fourth temperature sensor are respectively signal-connected with the controller, the controller is signal-connected with the circulating pump, and the controller is configured to control the power of the circulating pump according to temperature and pressure data.
[0016] Thanks to the technical scheme, the energy storage temperature control system of the utility model has the following advantages compared with the prior art: in the cooling mode, the liquid outlet of the first heat transfer device and the liquid outlet of the second heat transfer device are connected with the circulating pump through pipelines, the refrigerant discharged by the first heat transfer device and the refrigerant discharged by the second heat transfer device are mixed to realize the cooling of the refrigerant in the second circulating loop, and the mixed refrigerant flows to the liquid supply port of the first heat transfer device and the liquid supply port of the second heat transfer device along two different flow paths under the drive of the circulating pump, before the refrigerant is introduced into the second heat transfer device, the refrigerant exchanges heat with the refrigerant discharged by the compressor in the first heat exchanger, which on the one hand improves the temperature of the refrigerant introduced into the second heat transfer device to avoid the condensation phenomenon, and on the other hand reduces the temperature of the refrigerant to reduce the heat exchange load of the condenser and improve the energy efficiency of the temperature control system. BRIEF DESCRIPTION OF DRAWINGS
[0017] FIG. 1 is a schematic diagram of an energy storage temperature control system according to an embodiment of the utility model; Figure 1 FIG. 1 is a schematic diagram of an energy storage temperature control system according to an embodiment of the utility model;
[0018] FIG. 1 is a schematic diagram of an energy storage temperature control system according to an embodiment of the utility model; Figure 2 FIG. 1 is a schematic diagram of an energy storage temperature control system according to an embodiment of the utility model;
[0019] Wherein: 100a / 100b, liquid outlet; 200a / 200b, liquid supply port; 310, compressor; 320, condenser; 330, first heat exchanger; 331, first heat exchange channel; 332, second heat exchange channel; 340, second heat exchanger; 341, third heat exchange channel; 342, fourth heat exchange channel; 350, electronic expansion valve; 360, second filter; 410, circulating pump; 420, electronic valve; 430, first filter; 440, heater; 450, expansion tank; 460, liquid supplement pipeline; 470, liquid supplement valve. DETAILED DESCRIPTION
[0020] The technical solutions of the utility model will be described in detail below with reference to the drawings and specific embodiments, so that the advantages and features of the utility model are easier for the person skilled in the art to understand. Obviously, the described embodiments in the present application are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the scope of protection of the present application.
[0021] The energy storage device is provided with a first heat transfer device for heat exchange with the battery and a second heat transfer device for heat exchange with the energy storage converter Figure 1 The energy storage temperature control system includes a compressor 310, a condenser 320, a first heat exchanger 330 and a second heat exchanger 340. The outlet of the compressor 310 is connected to the first heat exchanger 330 through a pipeline, the first heat exchanger 330 is connected to the condenser 320 through a pipeline, the condenser 320 is connected to the second heat exchanger 340 through a pipeline, and the second heat exchanger 340 is connected to the inlet of the compressor 310 through a pipeline. The outlet of the compressor 310, the first heat exchanger 330, the condenser 320, the second heat exchanger 340 and the inlet of the compressor 310 are sequentially connected through pipelines to form a refrigerant circulation passage for circulating refrigerant.
[0022] In the embodiment, the energy storage temperature control system further includes an electronic expansion valve 350, which is arranged on the pipeline between the condenser 320 and the second heat exchanger 340. In the embodiment, the first heat exchanger 330 has a first heat exchange channel 331 and a second heat exchange channel 332 capable of exchanging heat, and the second heat exchanger 340 has a third heat exchange channel 341 and a fourth heat exchange channel 342 capable of exchanging heat. The outlet of the compressor 310 is connected to the first heat exchange channel 331 through a pipeline, the first heat exchange channel 331 is connected to the condenser 320 through a pipeline, the condenser 320 is connected to the electronic expansion valve 350 through a pipeline, the electronic expansion valve 350 is connected to the third heat exchange channel 341 through a pipeline, and the third heat exchange channel 341 is connected to the inlet of the compressor 310 through a pipeline. The outlet of the compressor 310, the first heat exchange channel 331, the condenser 320, the electronic expansion valve 350, the third heat exchange channel 341 and the inlet of the compressor 310 are sequentially connected through pipelines to form a refrigerant circulation passage for circulating refrigerant.
[0023] The refrigerant circulation process in the refrigerant circulation path is as follows: the compressor 310 discharges refrigerant in a high-temperature and high-pressure state, and the refrigerant flows into the first heat exchange channel 331 of the first heat exchanger 330. The refrigerant in the first heat exchange channel 331 can exchange heat with the refrigerant in the second heat exchange channel 332. The refrigerant flowing out of the first heat exchange channel 331 flows into the condenser 320 for cooling. After cooling, the refrigerant passes through the electronic expansion valve 350 and flows into the third heat exchange channel 341 of the second heat exchanger 340. The refrigerant in the third heat exchange channel 341 can exchange heat with the refrigerant in the fourth heat exchange channel 342, thereby converting all the refrigerant into a gaseous state. Finally, the gaseous refrigerant flows back to the compressor 310, and one cycle of the refrigerant is completed.
[0024] The energy storage temperature control system includes a circulating pump 410. In this embodiment, the outlet 100a of the first heat transfer device is connected to the inlet of the circulating pump 410 via a pipeline, the outlet 100b of the second heat transfer device is connected to the pipeline between the first heat transfer device and the circulating pump 410 via a pipeline, the outlet of the circulating pump 410 is connected to the second heat exchange channel 332 via a pipeline, the second heat exchange channel 332 is connected to the supply port 200b of the second heat transfer device via a pipeline, the outlet of the circulating pump 410 is connected to the fourth heat exchange channel 342 via a pipeline, and the fourth heat exchange channel 342 is connected to the supply port 200a of the first heat transfer device via a pipeline.
[0025] The energy storage temperature control system has a cooling mode. For details on the cooling mode, please refer to [link / reference]. Figure 2 As shown, compressor 310 is turned on, the refrigerant circulation path is connected, and the first heat transfer device, circulation pump 410, and fourth heat exchange channel 342 are connected in sequence through pipelines to form a first circulation loop; the second heat transfer device, circulation pump 410, and second heat exchange channel 332 are connected in sequence through pipelines to form a second circulation loop. In cooling mode, the refrigerant flowing out of the first heat exchange device mixes with the refrigerant flowing out of the second heat exchange device and flows together to circulation pump 410. After flowing through circulation pump 410, the mixed refrigerant is split, with a portion flowing into the second heat exchange channel 332 and exchanging heat with the refrigerant in the first heat exchange channel 331, raising the temperature of the refrigerant and lowering the temperature of the refrigerant. Then, the refrigerant with the increased temperature flows into the second heat exchange device from the liquid supply port 200b of the second heat exchange device and cools the energy storage converter. Another portion of the refrigerant diverted from the circulating pump 410 flows into the fourth heat exchange channel 342. The refrigerant in the fourth heat exchange channel 342 exchanges heat with the refrigerant in the third heat exchange channel 341 to lower the temperature of the refrigerant and raise the temperature of the refrigerant, causing the refrigerant to convert to a gaseous state. After cooling, the refrigerant flows into the first heat exchange device from the liquid supply port 200a of the first heat exchange device and cools the battery. The gaseous refrigerant flows back to the compressor 310 to participate in the next cycle.
[0026] The refrigerant for cooling the battery has a low temperature, and after heat exchange with the battery in the first heat exchange device, the temperature of the refrigerant flowing out of the liquid outlet 100a of the first heat exchange device is still lower than the suitable working temperature of the energy storage converter. Therefore, the refrigerant is mixed with the refrigerant flowing out of the liquid outlet 100b of the second heat exchange device to be heated for the first time, and the refrigerant is forced to exchange heat with the high-temperature refrigerant in the first heat exchanger 330 between the liquid inlet 200b of the second heat exchange device to be heated for the second time, so that the refrigerant flowing into the second heat exchange device reaches a suitable temperature.
[0027] In summary, in the second circulation loop, the refrigerant flowing out of the second heat exchange device is cooled and heated in sequence before flowing back into the second heat exchange device. Specifically, the refrigerant flowing out of the first heat exchange device is mixed with the refrigerant flowing out of the second heat exchange device to be cooled, and then the refrigerant is heated in the first heat exchanger 330. By flowing into the second heat exchange channel 332 of the first heat exchanger 330 before flowing back into the second heat exchange device, the refrigerant can not only help to cool the refrigerant and reduce the working load of the condenser 320, but also can increase the temperature of the refrigerant to prevent condensation from occurring in the energy storage converter.
[0028] In this embodiment, an electronic valve 420 for controlling the flow rate is arranged on the pipeline between the outlet of the circulating pump 410 and the second heat exchange channel 332. The flow rate of the refrigerant is controlled by controlling the opening and closing degree of the electronic valve 420, so as to control the temperature of the refrigerant flowing into the first heat exchange device.
[0029] In this embodiment, a first filter 430 is arranged in the pipeline between the liquid outlet 100a of the first heat exchange device and the circulating pump 410, and the liquid outlet 100b of the second heat exchange device is connected to the pipeline between the first heat exchange device and the first filter 430. The first filter 430 can remove impurities in the mixed refrigerant to ensure that the energy storage temperature control system operates normally and stably.
[0030] In this embodiment, a heater 440 is arranged on the pipeline between the fourth heat exchange channel 342 and the liquid inlet 200a of the first heat exchange device, and the heater 440 is closed in the cooling mode. The energy storage temperature control system also has a heating mode. When the ambient temperature is low and the temperature of the battery is lower than the preset working temperature, the heating mode is started, and the refrigerant in the first heat exchange device can heat the battery to make the battery reach a suitable working temperature range. Specifically, in the heating mode, the compressor 310 is closed, and the heater 440 is opened. When the refrigerant flows through the fourth heat exchange channel 342, no heat exchange occurs, and the heater 440 heats the refrigerant flowing therethrough, thereby increasing the temperature of the refrigerant flowing into the first heat exchange device. In this embodiment, the heater 440 is an electric heater.
[0031] In the embodiment, a second filter 360 is arranged on the pipeline between the condenser 320 and the electronic expansion valve 350, and the second filter 360 is used to remove impurities in the refrigerant and ensure normal operation of the refrigerant circulation loop.
[0032] In the embodiment, the heat transfer module includes an expansion tank 450, which is connected to the pipeline between the liquid outlet 100a of the first heat transfer device and the circulating pump 410. The expansion tank 450 serves as a buffer for the first circulation loop and the second circulation loop, which can maintain the balance of pressure in the first circulation loop and the second circulation loop and ensure stable flow of the refrigerant.
[0033] In the embodiment, the heat transfer module further includes a liquid supplementing device, which is connected to the pipeline between the expansion tank 450 and the circulating pump 410 through a liquid supplementing pipeline 460. The liquid supplementing device can ensure that there is always sufficient refrigerant in the first circulation loop and the second circulation loop. A liquid supplementing valve 470 is arranged on the liquid supplementing pipeline 460. When the cooling liquid in the first circulation loop and the second circulation loop is insufficient, the liquid supplementing valve 470 is opened, and the liquid supplementing device supplements the refrigerant in the first circulation loop and the second circulation loop through the liquid supplementing pipeline 460.
[0034] In summary, in the cooling mode, the liquid outlet 100a of the first heat transfer device and the liquid outlet 100b of the second heat transfer device are connected to the circulating pump 410 through pipelines, and the refrigerant discharged from the first heat transfer device and the refrigerant discharged from the second heat transfer device are mixed to achieve cooling of the refrigerant in the second circulation loop. The mixed refrigerant flows to the liquid inlet 200a of the first heat transfer device and the liquid inlet 200b of the second heat transfer device along two different flow paths under the drive of the circulating pump 410. Before the refrigerant enters the second heat transfer device, the refrigerant exchanges heat with the refrigerant discharged from the compressor 310 in the first heat exchanger 330, which on one hand increases the temperature of the refrigerant entering the second heat transfer device to avoid condensation, and on the other hand reduces the temperature of the refrigerant to reduce the heat exchange load of the condenser 320 and improve the energy efficiency of the temperature control system.
[0035] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable persons skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.
Claims
1. An energy storage temperature control system, an energy storage device being provided with a first heat transfer device for heat exchange with a battery and a second heat transfer device for heat exchange with an energy storage converter, characterized in that: The energy storage temperature control system comprises a compressor (310), a condenser (320), a first heat exchanger (330) and a second heat exchanger (340), the outlet of the compressor (310), the first heat exchanger (330), the condenser (320), the second heat exchanger (340) and the inlet of the compressor (310) are sequentially connected by pipelines and form a refrigerant circulation channel for circulating the refrigerant. The outlet (100a) of the first heat transfer device, the second heat exchanger (340) and the liquid inlet (200a) of the first heat transfer device are sequentially connected by pipelines and jointly form a first circulation loop for circulating the refrigerant, a circulating pump (410) is arranged on the pipeline between the outlet (100a) of the first heat transfer device and the second heat exchanger (340); the outlet (100b) of the second heat transfer device, the circulating pump (410), the first heat exchanger (330) and the liquid inlet (200b) of the second heat transfer device are sequentially connected by pipelines and jointly form a second circulation loop for circulating the refrigerant; the energy storage temperature control system has a cooling mode, in the cooling mode, the compressor (310) is turned on, the circulating pump (410) is turned on, the refrigerant circulates in the refrigerant circulation channel, and the refrigerant circulates in the first circulation loop and the second circulation loop.
2. The energy storage temperature control system of claim 1, wherein, An electronic valve (420) for controlling flow is arranged on the pipeline between the circulating pump (410) and the first heat exchanger (330).
3. The energy storage temperature control system of claim 1, wherein, A heater (440) is arranged on the pipeline between the second heat exchanger (340) and the liquid inlet (200a) of the first heat transfer device, the heater (440) is turned off in the cooling mode; the energy storage temperature control system has a heating mode, in the heating mode, the compressor (310) is turned off and the heater (440) is turned on.
4. The energy storage temperature control system of claim 1, wherein, The first heat exchanger (330) has a first heat exchange channel (331) and a second heat exchange channel (332) capable of exchanging heat, the second heat exchanger (340) has a third heat exchange channel (341) and a fourth heat exchange channel (342) capable of exchanging heat, the first heat exchange channel (331) and the third heat exchange channel (341) are located in the refrigerant circulation channel, the fourth heat exchange channel (342) is located in the first circulation loop, and the second heat exchange channel (332) is located in the second circulation loop.
5. The energy storage temperature control system of claim 1, wherein, A first filter (430) is arranged in the pipeline between the outlet (100a) of the first heat transfer device and the circulating pump (410), and the outlet (100b) of the second heat transfer device is connected to the pipeline between the first heat transfer device and the first filter (430) by a pipeline.
6. The energy storage temperature control system of claim 1, wherein, An electronic expansion valve (350) is arranged on the pipeline between the condenser (320) and the second heat exchanger (340), and a second filter (360) is arranged on the pipeline between the condenser (320) and the electronic expansion valve (350).
7. The energy storage temperature control system of claim 1, wherein, The energy storage temperature control system comprises an expansion tank (450) connected to the inlet of the circulating pump (410) through a pipeline.
8. The energy storage temperature control system of claim 7, wherein, The energy storage temperature control system further comprises a liquid supplementing device connected to the pipeline between the expansion tank (450) and the circulating pump (410) through a liquid supplementing pipeline (460), wherein a liquid supplementing valve (470) is arranged on the liquid supplementing pipeline (460).
9. The energy storage temperature control system of claim 1, wherein, The energy storage temperature control system comprises a controller, a first temperature sensor arranged at the inlet of the compressor (310), and a second temperature sensor arranged at the outlet of the compressor (310), wherein the first temperature sensor and the second temperature sensor are respectively connected to the controller in signal; an electronic expansion valve (350) is arranged on the pipeline between the condenser (320) and the second heat exchanger (340), wherein the electronic expansion valve (350) is connected to the controller in signal, and the controller is configured to control the opening and closing degree of the electronic expansion valve (350) according to temperature data; the compressor (310) is connected to the controller in signal, and the controller is configured to control the rotating speed of the compressor (310) according to temperature data.
10. The energy storage temperature control system of claim 1, wherein, The energy storage temperature control system comprises a controller, a third temperature sensor and a first pressure sensor arranged at the inlet of the circulating pump (410), and a fourth temperature sensor arranged at the liquid supply port (200a) of the first heat transfer device, wherein the third temperature sensor, the first pressure sensor, and the fourth temperature sensor are respectively connected to the controller in signal, the controller is connected to the circulating pump (410) in signal, and the controller is configured to control the power of the circulating pump (410) according to temperature and pressure data.