Temperature control system

Abstract

The utility model discloses a temperature control system. The temperature control system comprises a compressor, a condenser, a first switch valve, a fluorine pump and a battery pack, the condenser is provided with a first condensation channel and a second condensation channel; an outlet of the compressor communicates with an inlet of the first condensation channel. An outlet of the first condensation channel communicates with an inlet of the battery pack through the fluorine pump. An outlet of the compressor communicates with an inlet of the battery pack through a first switch valve; an inlet of the second condensation channel is used for introducing a heat dissipation medium, and an outlet of the second condensation channel is used for allowing the heat dissipation medium to flow out. By the adoption of the scheme, the problem that the heat exchange effect is poor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a temperature control system. Background Art

[0002] The number of battery packs is generally large, and a large amount of heat will be generated during the fast charge and discharge process, and a fast and effective way is needed for heat dissipation.

[0003] In the related art, for the temperature control of battery packs, one method is to produce low-temperature liquid through a refrigeration unit and introduce it into the end for heat dissipation, and the other method is to use the battery pack as the evaporator of the refrigeration unit for heat dissipation. However, the heat exchange effect of the above methods is poor. Summary of the Utility Model

[0004] The utility model provides a temperature control system to solve the problem of poor heat exchange effect.

[0005] According to one aspect of the utility model, a temperature control system is provided. The temperature control system includes a compressor, a condenser, a first switching valve, a fluorine pump and a battery pack;

[0006] The condenser has a first condensation channel and a second condensation channel;

[0007] The outlet of the compressor is communicated with the inlet of the first condensation channel, and the outlet of the first condensation channel is communicated with the inlet of the battery pack through the fluorine pump;

[0008] The outlet of the compressor is communicated with the inlet of the battery pack through the first switching valve;

[0009] The inlet of the second condensation channel is used for introducing a heat dissipation medium, and the outlet of the second condensation channel is used for the heat dissipation medium to flow out.

[0010] In an optional embodiment of the utility model, a liquid storage tank, a second switching valve and a circulation tank are arranged between the outlet of the first condensation channel and the fluorine pump;

[0011] The outlet of the first condensation channel is communicated with the inlet of the liquid storage tank, and the first outlet of the liquid storage tank is communicated with the first inlet of the circulation tank through the second switching valve;

[0012] The liquid outlet of the circulation tank is communicated with the fluorine pump.

[0013] In an optional embodiment of the utility model, the liquid outlet of the circulation tank is located at the bottom of the circulation tank.

[0014] In an optional embodiment of the utility model, the outlet of the battery pack is communicated with the second inlet of the circulation tank.

[0015] In an alternative embodiment of the present utility model, the gas outlet of the circulation tank is communicated with the first gas inlet of the compressor.

[0016] In an alternative embodiment of the present utility model, a check valve is further included. The water inlet of the check valve is communicated with the fluorine pump, and the water outlet of the check valve is communicated with the inlet of the battery pack.

[0017] In an alternative embodiment of the present utility model, an economizer and a third switching valve are further included. The economizer includes a first channel. The second outlet of the liquid storage tank is communicated with the inlet of the first channel through the third switching valve, and the outlet of the first channel is connected with the second gas inlet of the compressor.

[0018] In an alternative embodiment of the present utility model, a fourth switching valve is further included. The economizer further includes a second channel. The second outlet of the liquid storage tank is communicated with the inlet of the second channel, and the outlet of the second channel is communicated with the third inlet of the circulation tank through the fourth switching valve.

[0019] In an alternative embodiment of the present utility model, an oil separator is further included. The outlet of the compressor is communicated with the inlet of the oil separator, the oil return port of the oil separator is communicated with the oil return inlet of the compressor, and the outlet of the oil separator is communicated with the inlet of the first condensation channel and the first switching valve.

[0020] In an alternative embodiment of the present utility model, the first switching valve is an expansion valve; and / or,

[0021] The second switching valve is a solenoid valve.

[0022] The technical solution of the embodiment of the present utility model is achieved by providing a compressor, a condenser, a first switching valve, a fluorine pump and a battery pack; the outlet of the compressor is communicated with the inlet of the first condensation channel, and the outlet of the first condensation channel is communicated with the inlet of the battery pack through the fluorine pump; the outlet of the compressor is communicated with the inlet of the battery pack through the first switching valve. When the battery pack needs to be cooled, compared with a system that directly cools by a vapor compression cycle alone, through the fluorine pump, the refrigerant entering the battery pack for heat exchange is a saturated liquid. Compared with a gas-liquid two-phase cycle, the circulation flow rate is high and the heat exchange effect is good. Therefore, the problem of poor heat exchange effect is solved. By dividing the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor into two paths, when the battery pack needs to be at a constant temperature, the high-temperature and high-pressure gaseous refrigerant is mixed with the liquid refrigerant to ensure that the temperature entering the battery pack is constant, and a stable working condition can be maintained for system testing. When the battery pack needs to be defrosted, by opening the first switching valve, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor will directly enter the battery pack through the inlet of the battery pack to achieve rapid defrosting of the battery pack.

[0023] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of a temperature control system provided for an embodiment of the present utility model.

[0026] Wherein: 1. Compressor; 2. Condenser; 3. First switching valve; 4. Fluorine pump; 5. Battery pack; 6. Liquid storage tank; 7. Second switching valve; 8. Circulation tank; 9. Check valve; 10. Economizer; 11. Third switching valve; 12. Oil separator; 13. Fourth switching valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 1 It is a schematic structural diagram of a temperature control system provided for an embodiment of the present utility model, asFigure 1 As shown in the figure, the temperature control system includes a compressor 1, a condenser 2, a first switching valve 3, a fluorine pump 4 and a battery pack 5.

[0030] The condenser 2 has a first condensation channel and a second condensation channel, and the fluids flowing in the first condensation channel and the second condensation channel can exchange heat with each other.

[0031] The outlet of the compressor 1 is communicated with the inlet of the first condensation channel, and the outlet of the first condensation channel is communicated with the inlet of the battery pack 5 through the fluorine pump 4; the outlet of the compressor 1 is communicated with the inlet of the battery pack 5 through the first switching valve 3; therefore, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 1 will be divided into two paths, one path enters the first condensation channel to be condensed, and the other path is communicated to the first switching valve 3. The communication in this solution means connecting to the components to be communicated through components such as pipelines that can allow fluid to flow. The first switching valve 3 is a valve that can control the outflow or blockage of fluid. In some embodiments, the first switching valve 3 is an expansion valve. The expansion valve has precise control, rapid response and a large adjustment range, so it can be adjusted to different opening degrees to adjust the flow rate of the high-temperature and high-pressure gaseous refrigerant entering the inlet of the battery pack 5.

[0032] The inlet of the second condensation channel is used to introduce a heat dissipation medium, and the outlet of the second condensation channel is used for the heat dissipation medium to flow out. The main function of the condenser 2 is to cool and condense gas or steam, so that the energy of the gas or steam can be transferred to the heat dissipation medium. The heat dissipation medium is a material used to help the equipment or system dissipate heat during operation. In some embodiments, the heat dissipation medium includes a coolant, and the coolant exchanges heat with the gaseous refrigerant in the first condensation channel to condense the gaseous refrigerant. In some embodiments, the heat dissipation medium includes chilled water, and the chilled water exchanges heat with the gaseous refrigerant in the first condensation channel to condense the gaseous refrigerant.

[0033] When the battery pack 5 needs to be cooled, the first switching valve 3 is closed and the fluorine pump 4 is turned on. At this time, the liquid refrigerant condensed by the first condensation channel of the condenser 2 enters the fluorine pump 4. After the fluorine pump 4 increases the pressure, it enters the battery pack 5 through the inlet of the battery pack 5 to exchange heat with the battery pack 5.

[0034] When the battery pack 5 needs to be kept at a constant temperature, when the first switching valve 3 and the fluorine pump 4 are both turned on, that is, the high-temperature and high-pressure gaseous refrigerant is mixed with the low-temperature liquid refrigerant at the outlet of the fluorine pump 4 and enters the inlet of the battery pack 5 to control the temperature of the battery pack 5. By adjusting the opening degree of the first switching valve 3 according to the temperature required at the inlet of the battery pack 5, the amount of the high-temperature gaseous refrigerant can be controlled, so that the temperature of the mixed refrigerant is different, and the temperature adjustment of the inlet of the battery pack 5 is realized.

[0035] When the battery pack 5 needs defrosting, the first switching valve 3 is opened, so that the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 1 will directly enter the interior of the battery pack 5 through the inlet of the battery pack 5 to achieve defrosting of the battery pack 5.

[0036] In the above solution, by setting the compressor 1, the condenser 2, the first switching valve 3, the fluorine pump 4 and the battery pack 5; the outlet of the compressor 1 is communicated with the inlet of the first condensation channel, and the outlet of the first condensation channel is communicated with the inlet of the battery pack 5 through the fluorine pump 4; the outlet of the compressor 1 is communicated with the inlet of the battery pack 5 through the first switching valve 3. When the battery pack 5 needs to dissipate heat and cool down, compared with the system that directly cools down through the vapor compression cycle alone, through the fluorine pump 4, the refrigerant entering the battery pack 5 for heat exchange is a saturated liquid. Compared with the gas-liquid two-phase cycle, the circulation flow rate is high and the heat exchange effect is good. Therefore, the problem of poor heat exchange effect is solved. By dividing the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 1 into two paths, when the battery pack 5 needs to be kept at a constant temperature, the high-temperature and high-pressure gaseous refrigerant is mixed with the liquid refrigerant to ensure that the temperature entering the battery pack 5 is constant, and a stable working condition can be maintained for system testing. When the battery pack 5 needs defrosting, by opening the first switching valve 3, the high-temperature and high-pressure gaseous refrigerant discharged from the outlet of the compressor 1 will directly enter the interior of the battery pack 5 through the inlet of the battery pack 5 to achieve rapid defrosting of the battery pack 5.

[0037] In an alternative embodiment of the present invention, as Figure 1 shown, the temperature control system further includes an oil separator 12. The outlet of the compressor 1 is communicated with the inlet of the oil separator 12, the oil return port of the oil separator 12 is communicated with the oil return inlet of the compressor 1, and the outlet of the oil separator 12 is communicated with the inlet of the first condensation channel and the first switching valve 3. Among them, the function of the oil separator 12 is to separate the lubricating oil in the high-pressure steam discharged from the refrigeration compressor 1 to ensure the safe and efficient operation of the device. Therefore, the high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 1 is separated from oil through the oil separator 12, the oil returns to the compressor 1 through the oil return port of the oil separator 12, and the high-temperature and high-pressure gaseous refrigerant is divided into two paths after passing through the oil. One path enters the first condensation channel to be condensed, and the other path is communicated to the first switching valve 3.

[0038] In an alternative embodiment of the present utility model, a liquid storage tank 6, a second switching valve 7, and a circulation tank 8 are provided between the outlet of the first condensation channel and the fluorine pump 4; the outlet of the first condensation channel is communicated with the inlet of the liquid storage tank 6, and the first outlet of the liquid storage tank 6 is communicated with the first inlet of the circulation tank 8 through the second switching valve 7; the liquid outlet of the circulation tank 8 is communicated with the fluorine pump 4. Among them, the second switching valve 7 refers to a valve that can control the outflow or blockage of fluid. In some embodiments, the second switching valve 7 is a solenoid valve. Both the liquid storage tank 6 and the circulation tank 8 are tanks that can store liquid. Since the outlet of the first condensation channel is communicated with the inlet of the liquid storage tank 6, the condensed refrigerant will flow into the liquid storage tank 6. When the second switching valve 7 is opened, the refrigerant will flow into the circulation tank 8, and the liquid refrigerant in the circulation tank 8 will flow to the fluorine pump 4 through the liquid outlet.

[0039] Based on the above embodiments, as Figure 1 shown, the liquid outlet of the circulation tank 8 is located at the bottom of the circulation tank 8. Since the refrigerant in the form of gas-liquid two-phase stratifies after entering the circulation tank 8, the liquid refrigerant is located at the bottom of the circulation tank 8. By arranging the liquid outlet of the circulation tank 8 at the bottom of the circulation tank 8, the liquid refrigerant can enter the fluorine pump 4 through the liquid outlet at the bottom of the circulation tank 8.

[0040] In an alternative embodiment of the present utility model, the outlet of the battery pack 5 is communicated with the second inlet of the circulation tank 8. Therefore, the liquid refrigerant enters the fluorine pump 4 from the bottom of the circulation tank 8. After being pressurized by the fluorine pump 4, it enters the battery pack 5. After heat exchange with the battery pack 5, it becomes a refrigerant in the form of gas-liquid two-phase and enters the circulation tank 8, forming a fluorine pump 4 circulation.

[0041] In an alternative embodiment of the present utility model, the temperature control system further includes a check valve 9. The water inlet of the check valve 9 is communicated with the fluorine pump 4, and the water outlet of the check valve 9 is communicated with the inlet of the battery pack 5. Therefore, the check valve 9 can prevent the reverse flow of the refrigerant and affect the system energy efficiency.

[0042] In an alternative embodiment of the present utility model, as Figure 1 shown, the gas outlet of the circulation tank 8 is communicated with the first gas inlet of the compressor 1. Preferably, the gas outlet of the circulation tank 8 is located at the top of the circulation tank 8. The refrigerant in the form of gas-liquid two-phase will stratify in the circulation tank 8, and the gaseous refrigerant will return to the compressor 1 from the gas outlet of the circulation tank 8 to complete the refrigeration cycle of the compressor 1.

[0043] In an alternative embodiment of the present utility model, as Figure 1As shown in the figure, the temperature control system further includes an economizer 10 and a third switching valve 11. The economizer 10 includes a first channel. The second outlet of the liquid storage tank 6 is connected to the inlet of the first channel through the third switching valve 11, and the outlet of the first channel is connected to the second gas inlet of the compressor 1. The temperature control system further includes a fourth switching valve 13. The economizer 10 further includes a second channel. The second outlet of the liquid storage tank 6 is communicated with the inlet of the second channel, and the outlet of the second channel is communicated with the third inlet of the circulation tank 8 through the fourth switching valve 13.

[0044] Among them, the economizer 10 is a heat exchanger that absorbs heat through the throttling evaporation of the refrigerant itself, so that another part of the refrigerant is subcooled. Both the third switching valve 11 and the fourth switching valve 13 are valves that can control the outflow or blockage of fluids. In some embodiments, both the third switching valve 11 and the fourth switching valve 13 are expansion valves. The fluids in the first channel and the second channel of the economizer 10 can exchange heat. The refrigerant passing through the third switching valve 11 is throttled and then enters the first channel of the economizer 10, exchanges heat with the refrigerant directly entering the second channel of the economizer 10 from the liquid storage tank 6 to subcool it, and the refrigerant passing through the third switching valve 11 returns to the compressor 1 after absorbing heat through the outlet of the first channel, improving the energy efficiency of the system. After being subcooled, the liquid refrigerant is throttled by the fourth switching valve 13 and then becomes a refrigerant in a gas-liquid two-phase state and enters the circulation tank 8.

[0045] The following specifically describes the specific principle of this solution:

[0046] Vapor compression refrigeration cycle: The high-temperature and high-pressure gaseous refrigerant at the outlet of the compressor 1 is separated from oil through the oil separator 12. The oil returns to the compressor 1 through the oil return port of the oil separator 12. After passing through the oil separator 12, the refrigerant is divided into two paths. One path exchanges heat with the heat dissipation medium through the condenser 2, and the other path is connected to the first switching valve 3. In this cycle, the opening degree of the first switching valve 3 is 0%, that is, it is fully closed. The refrigerant condensed by the condenser 2 enters the liquid storage tank 6 and is divided into three paths from the liquid storage tank 6. One path is connected to the second switching valve 7, one path is connected to the third switching valve 11, and the other path directly enters the second channel of the economizer 10. In this cycle, the second switching valve 7 is closed. The refrigerant passing through the third switching valve 11 is throttled and then enters the first channel of the economizer 10, exchanges heat with the refrigerant directly entering the second channel of the economizer 10 from the liquid storage tank 6 to subcool it, and the refrigerant passing through the third switching valve 11 returns to the compressor 1 after absorbing heat, improving the energy efficiency of the system. After being subcooled, the liquid refrigerant is throttled by the fourth switching valve 13 and then becomes a refrigerant in a gas-liquid two-phase state and enters the circulation tank 8, where the gas-liquid two-phase is stratified. The gaseous refrigerant returns to the compressor 1 from the top of the circulation tank 8 to complete the vapor compression refrigeration cycle. The liquid refrigerant enters the fluorine pump 4 from the bottom and enters the fluorine pump 4 for circulation.

[0047] Fluorine pump 4 circulation: The liquid refrigerant enters the fluorine pump 4 from the bottom of the circulation tank 8. After being pressurized by the fluorine pump 4, it passes through the check valve 9 and enters the battery pack 5. After exchanging heat with the battery pack 5, it becomes a refrigerant in a gas-liquid two-phase state and enters the circulation tank 8. Compared with a system that directly cools down through a vapor compression cycle alone, through the fluorine pump 4 circulation, the refrigerant entering the battery pack 5 for heat exchange is a saturated liquid. Compared with the gas-liquid two-phase cycle, the circulation flow rate is high and the heat exchange effect is good.

[0048] Constant temperature mode: When the battery pack 5 needs to maintain a constant temperature, the first switching valve 3 is opened. The high-temperature gaseous refrigerant is mixed with the low-temperature liquid refrigerant at the outlet of the fluorine pump 4 to ensure that the temperature of the refrigerant entering the battery pack 5 is constant, and a stable working condition can be maintained for system testing. By adjusting the opening degree of the first switching valve 3 according to the temperature required at the inlet of the battery pack 5, the amount of the high-temperature gaseous refrigerant can be controlled, so that the temperature of the mixed refrigerant is different, and the inlet temperature of the battery pack 5 can be adjusted.

[0049] Defrosting mode: When defrosting is required on the battery pack 5 side, the opening degree of the first switching valve 3 is 100%, the second switching valve 7 is opened, and the opening degrees of the third switching valve 11 and the fourth switching valve 13 are 0%, that is, they are completely closed. The high-temperature gaseous refrigerant directly enters the inlet of the battery pack 5. The high-temperature liquid refrigerant in the liquid storage tank 6 directly enters the circulation tank 8 through the second switching valve 7, and after being mixed with the high-temperature gaseous refrigerant by the fluorine pump 4, it enters the battery pack 5 to achieve rapid defrosting.

[0050] It should be understood that various forms of processes shown above can be used, reordering, adding or deleting steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0051] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A temperature control system, characterized in that, It includes a compressor, a condenser, a first switching valve, a fluorine pump and a battery pack; The condenser has a first condensation channel and a second condensation channel; The outlet of the compressor is communicated with the inlet of the first condensation channel, and the outlet of the first condensation channel is communicated with the inlet of the battery pack through the fluorine pump; The outlet of the compressor is communicated with the inlet of the battery pack through the first switching valve; The inlet of the second condensation channel is used for introducing a heat dissipation medium, and the outlet of the second condensation channel is used for discharging the heat dissipation medium.

2. The temperature control system according to claim 1, characterized in that A liquid storage tank, a second switching valve and a circulation tank are arranged between the outlet of the first condensation channel and the fluorine pump; The outlet of the first condensation channel is communicated with the inlet of the liquid storage tank, and the first outlet of the liquid storage tank is communicated with the first inlet of the circulation tank through the second switching valve; The liquid outlet of the circulation tank is communicated with the fluorine pump.

3. The temperature control system according to claim 2, characterized in that, The liquid outlet of the circulation tank is located at the bottom of the circulation tank.

4. The temperature control system according to claim 2, wherein The outlet of the battery pack is communicated with the second inlet of the circulation tank.

5. The temperature control system according to claim 2, characterized in that, The gas outlet of the circulation tank is communicated with the first gas inlet of the compressor.

6. The temperature control system according to any one of claims 1 to 5, characterized in that It further includes a check valve, the water inlet of the check valve is communicated with the fluorine pump, and the water outlet of the check valve is communicated with the inlet of the battery pack.

7. The temperature control system according to any one of claims 2 to 5, characterized in that, It further includes an economizer and a third switching valve, the economizer includes a first channel, the second outlet of the liquid storage tank is communicated with the inlet of the first channel through the third switching valve, and the outlet of the first channel is connected with the second gas inlet of the compressor.

8. The temperature control system according to claim 7, wherein It further includes a fourth switching valve, the economizer further includes a second channel, the second outlet of the liquid storage tank is communicated with the inlet of the second channel, and the outlet of the second channel is communicated with the third inlet of the circulation tank through the fourth switching valve.

9. The temperature control system according to any one of claims 1 to 5, characterized in that It further includes an oil separator, the outlet of the compressor is communicated with the inlet of the oil separator, the oil return port of the oil separator is communicated with the oil return inlet of the compressor, and the outlet of the oil separator is communicated with the inlet of the first condensation channel and the first switching valve.

10. The temperature control system according to any one of claims 2 to 5, characterized in that The first switching valve is an expansion valve; and / or, The second switching valve is a solenoid valve.

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